June Paper 1 Exam Medium

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Questions and Answers

What is the primary reason for the unequal heating of the Earth's surface?

  • Variation in atmospheric pressure
  • Differences in elevation
  • Variation in the angle at which the Sun's rays strike different parts of the planet (correct)
  • Changes in magnetic field intensity

How does the concept of insolation vary with latitude?

  • It remains constant across all latitudes
  • It increases at higher latitudes
  • It is not affected by latitude
  • It decreases at higher latitudes (correct)

What effect does ice and snow have on energy absorption in high latitude regions?

  • It has no impact on energy absorption
  • It decreases energy absorption (correct)
  • It causes energy to be absorbed faster
  • It increases energy absorption

What type of radiation does the Earth's surface absorb from the Sun?

<p>Short-wave radiation (B)</p> Signup and view all the answers

How does the Earth's atmosphere get heated from below?

<p>By re-radiated lower energy, long-wave infrared energy from the Earth's surface (A)</p> Signup and view all the answers

Why do equatorial regions experience higher temperatures compared to polar regions?

<p>Because equatorial regions receive solar radiation more directly while polar regions receive it at a more oblique angle (C)</p> Signup and view all the answers

What is the primary factor attributed to the formation of tors?

<p>Chemical weathering (D)</p> Signup and view all the answers

In South Africa, which physiographic region is characterized by a saucer-shaped interior plateau?

<p>The Central Highveld (B)</p> Signup and view all the answers

Which region in South Africa is famous for its extensive arid landscapes?

<p>The Great Karoo Basin (D)</p> Signup and view all the answers

What type of slope curves outward and resembles the exterior of a sphere?

<p>Convex Slope (D)</p> Signup and view all the answers

Which factor contributes significantly to the distinctive rock shapes and rounded boulders found in tors?

<p>Water percolating through joints (D)</p> Signup and view all the answers

What geological process leads to the expansion of vertical and horizontal joints in rocks?

<p>Chemical weathering (B)</p> Signup and view all the answers

What is the impact of the convergence of moist air masses on regions like Calabar and Kano?

<p>High rainfall (C)</p> Signup and view all the answers

Which ocean currents contribute to dry and arid conditions in regions like the Namib Desert?

<p>Benguela and Canary currents (D)</p> Signup and view all the answers

What characterizes La Niña conditions in the Pacific Ocean?

<p>Stronger trade winds and upwelling of cold water (D)</p> Signup and view all the answers

How are high and low pressure cells identified on synoptic weather maps?

<p>By closed circular isobars (B)</p> Signup and view all the answers

What percentage of Earth's land area do drylands cover?

<p>41% (C)</p> Signup and view all the answers

Which region experiences the highest frequency of droughts according to the text?

<p>Sahel region in Africa (B)</p> Signup and view all the answers

What does agricultural drought specifically impact?

<p>Soil moisture affecting crops (B)</p> Signup and view all the answers

What is desertification primarily a result of?

<p>Human activities and climatic changes (A)</p> Signup and view all the answers

Which region absorbs more energy than it loses?

<p>The equator (D)</p> Signup and view all the answers

What causes the formation of the Subpolar Low Pressure Zone?

<p>Centrifugal forces due to Earth's rotation (D)</p> Signup and view all the answers

What causes seasonal variations in insolation?

<p>Tilt of the Earth's axis (D)</p> Signup and view all the answers

What are equinoxes characterized by?

<p>Equal day and night lengths globally (B)</p> Signup and view all the answers

Which of the following weather conditions is typically associated with the Polar High Pressure Zone?

<p>Cool and dry conditions (A)</p> Signup and view all the answers

What effect does the Coriolis Force have on wind direction in the Southern Hemisphere?

<p>Deflects wind left (D)</p> Signup and view all the answers

How does warm air move in the atmosphere?

<p>It moves towards the poles at high altitudes (A)</p> Signup and view all the answers

Which cell is responsible for driving polar climates?

<p>Polar Cell (B)</p> Signup and view all the answers

What drives oceanic circulation?

<p>Differences in water density (B)</p> Signup and view all the answers

Where is the Equatorial Low Pressure Zone located?

<p>Between 10° N and 10° S (D)</p> Signup and view all the answers

What type of winds are characterized by seasonal reversals in wind direction?

<p>Monsoon Winds (A)</p> Signup and view all the answers

What is the role of global air circulation?

<p>To redistribute thermal energy, air, and water around the Earth (D)</p> Signup and view all the answers

What plays a significant role in determining the dry seasons in Africa?

<p>Subsidence (C)</p> Signup and view all the answers

How do subtropical high-pressure zones influence climates?

<p>By producing hot, dry air over deserts (C)</p> Signup and view all the answers

What characteristic differentiates Föhn winds from Monsoon winds?

<p>Dry and warm downslope winds (D)</p> Signup and view all the answers

What process widens valleys through lateral erosion, mass movement, and weathering?

<p>Scarp retreat (A)</p> Signup and view all the answers

What type of rocks primarily form granite domes and tors?

<p>Igneous rocks (B)</p> Signup and view all the answers

What is the distinctive feature of laccoliths among intrusive bodies associated with massive igneous rocks?

<p>Create mushroom-shaped intrusions (C)</p> Signup and view all the answers

What geomorphological process is instrumental in altering landscapes and reducing plateaus to smaller landforms?

<p>Scarp retreat (A)</p> Signup and view all the answers

What type of landforms are commonly formed by scarp retreat over time?

<p>Mesas and buttes (A)</p> Signup and view all the answers

What type of rocks are characterized by layers formed from material deposition over time?

<p>Sedimentary rocks (B)</p> Signup and view all the answers

What significant role do intrusive igneous rock bodies play in shaping the geological landscape?

<p>Becoming visible after erosion (D)</p> Signup and view all the answers

What do pipes represent among the types of intrusive bodies associated with massive igneous rocks?

<p>Chimney-shaped intrusions transporting magma near the surface. (D)</p> Signup and view all the answers

What type of intrusion is characterized by magma intruding between sedimentary layers causing the lower layer to sink?

<p>Lopoliths (C)</p> Signup and view all the answers

What characteristic makes batholiths distinctive among intrusive bodies associated with massive igneous rocks?

<p>Being composed of granite (C)</p> Signup and view all the answers

What key process leads to the formation of tors?

<p>Expansion of vertical and horizontal joints in the rock (C)</p> Signup and view all the answers

Which intrusive body type is characterized by chimney-shaped intrusions?

<p>Pipes (A)</p> Signup and view all the answers

How are granite domes primarily exposed at the surface?

<p>By the gradual removal of overlying material caused by erosion (D)</p> Signup and view all the answers

What distinguishes massive igneous rocks from sedimentary rocks in terms of formation layers?

<p>Sedimentary rocks do not form in layers. (B)</p> Signup and view all the answers

Which type of intrusive body forms when magma intrudes between sedimentary layers?

<p>Lopoliths (A)</p> Signup and view all the answers

What primarily leads to the distinctive rock shapes and rounded boulders typical of tors?

<p>Expansion of vertical and horizontal joints in the rock (D)</p> Signup and view all the answers

What is the major contributing factor to the exposure of massive igneous structures like granite domes over time?

<p>Erosion and weathering processes (A)</p> Signup and view all the answers

Which intrusive body type is characterized by horizontal layers formed as magma spreads between existing rock layers?

<p>Sills (A)</p> Signup and view all the answers

What distinguishes batholiths from laccoliths in terms of size and composition?

<p>Batholiths are larger and composed of granite, while laccoliths are smaller and composed of sedimentary rock. (D)</p> Signup and view all the answers

How do pipes differ from dykes in terms of their shape and function?

<p>Pipes transport magma vertically, while dykes are chimney-shaped intrusions. (D)</p> Signup and view all the answers

What is the estimated annual land degradation into desert worldwide?

<p>12 million hectares (D)</p> Signup and view all the answers

Which of the following is NOT listed as a direct cause of desertification in the text?

<p>Urbanization (B)</p> Signup and view all the answers

What is a consequence of desertification at the global level as stated in the text?

<p>Contributes to biodiversity loss (B)</p> Signup and view all the answers

Which type of landscape develops in regions where horizontal rock layers erode at different rates?

<p>Canyon landscapes (D)</p> Signup and view all the answers

What role does climate play in the development of hilly landscapes?

<p>Promotes chemical weathering (B)</p> Signup and view all the answers

Which landscape type is characterized by extensive lava flows over millions of years?

<p>Basaltic plateaus (B)</p> Signup and view all the answers

What contributes to the formation of deep valleys with stepped sides in canyon landscapes?

<p>Vertical erosion by rivers (A)</p> Signup and view all the answers

Which landscape type forms when more resistant rocks create prominent hills within the landscape?

<p>Hilly landscapes (B)</p> Signup and view all the answers

What is the primary factor influencing the formation of high and low-pressure cells?

<p>Land and water heating differentials (B)</p> Signup and view all the answers

In which latitudinal zone do high pressure cells exhibit anti-clockwise sinking air?

<p>30°-60° (A)</p> Signup and view all the answers

What drives wind from high to low-pressure areas?

<p>Pressure Gradient (B)</p> Signup and view all the answers

What type of wind results from the balance between pressure gradient and Coriolis forces at high altitudes?

<p>Jet Streams (B)</p> Signup and view all the answers

Which global air circulation cell is responsible for temperate weather patterns?

<p>Ferrel Cell (C)</p> Signup and view all the answers

What characterizes a Föhn wind?

<p>Dry, warm downslope winds (C)</p> Signup and view all the answers

Where are Jet Streams located that influence weather patterns?

<p>At high altitudes (A)</p> Signup and view all the answers

What causes air to deflect right in the Northern Hemisphere according to the text?

<p>'Coriolis Force' (B)</p> Signup and view all the answers

Why do higher latitudes near the poles have cooler temperatures compared to regions near the equator?

<p>They receive less solar energy due to the Sun's rays striking the Earth at a more oblique angle. (B)</p> Signup and view all the answers

What effect does the reflective properties of ice and snow have on energy absorption in regions near the poles?

<p>It decreases energy absorption by reflecting solar radiation back into space. (D)</p> Signup and view all the answers

How does the Earth's surface heat the atmosphere according to the text?

<p>By absorbing high energy and re-radiating it as lower energy, long-wave infrared energy. (B)</p> Signup and view all the answers

What is the primary reason for the unequal heating of the Earth's surface?

<p>The variation in angle at which the Sun's rays strike different parts of the planet. (B)</p> Signup and view all the answers

What role does atmospheric and oceanic circulation play in transporting heat across the Earth?

<p>It drives patterns that transport heat from the equator towards the poles. (D)</p> Signup and view all the answers

How does insolation vary with latitude according to the text?

<p>It varies significantly, being highest near the equator and lowest near the poles. (D)</p> Signup and view all the answers

What geological process is predominantly responsible for the formation of tors?

<p>Chemical weathering (B)</p> Signup and view all the answers

Which physiographic region in South Africa is described as a semi-arid region and known for its arid landscapes?

<p>The Great Karoo Basin (C)</p> Signup and view all the answers

Which type of slope curves outward and resembles the exterior of a sphere?

<p>Convex Slope (C)</p> Signup and view all the answers

What characterizes the Southwestern Cape Fold Belt Mountains physiographic region in South Africa?

<p>Series of folded mountains shaped by tectonic forces (B)</p> Signup and view all the answers

Which type of intrusive body is characterized by chimney-shaped intrusions?

<p>Pipes (D)</p> Signup and view all the answers

What contributes to the gradual ascending terrain from west to east in South Africa?

<p>Plate tectonics movement (C)</p> Signup and view all the answers

What type of drought is defined by long periods of below-average rainfall?

<p>Meteorological Drought (B)</p> Signup and view all the answers

Which oceanic phenomenon is responsible for the dry and arid conditions in regions like the Namib Desert?

<p>Benguela Current (A)</p> Signup and view all the answers

What is the primary cause of desertification as mentioned in the text?

<p>Human activities (A)</p> Signup and view all the answers

How are high and low-pressure cells identified on synoptic weather maps?

<p>By closed circular isobars (D)</p> Signup and view all the answers

What climatic phenomenon is characterized by the upwelling of cold water in the Pacific Ocean?

<p>La Niña (C)</p> Signup and view all the answers

Which region experiences the most significant temperature fluctuations due to its distance from the sea?

<p>Kano (C)</p> Signup and view all the answers

What do isobars represent on synoptic weather maps?

<p>Atmospheric pressure patterns (B)</p> Signup and view all the answers

In dryland ecosystems, which category is characterized by the highest aridity level?

<p>Hyperarid areas (D)</p> Signup and view all the answers

How do El Niño and La Niña events differ?

<p>La Niña involves a reversal of air and sea water circulation patterns. (D)</p> Signup and view all the answers

What is the role of oceans in driving global climate as described in the text?

<p>Influencing weather patterns through warm currents. (C)</p> Signup and view all the answers

What geological structure gives rise to various types of landscapes such as hilly landscapes, basaltic plateaus, canyon landscapes, and Karoo landscapes?

<p>Horizontally layered rocks (C)</p> Signup and view all the answers

In hilly landscapes, what role does the climate play in their development?

<p>Causing chemical weathering (A)</p> Signup and view all the answers

Which type of landscape is characterized by lava flows covering large areas and accumulating to significant depths over millions of years?

<p>Basaltic plateaus (C)</p> Signup and view all the answers

What distinguishes canyon landscapes from other landscape types?

<p>Stepped sides in deep valleys (B)</p> Signup and view all the answers

What drives the movement of thermal energy, air, and water from regions near the Equator to polar regions according to the text?

<p>Differences in air pressure and temperature (D)</p> Signup and view all the answers

What characterizes the equatorial low-pressure zone according to the text?

<p>Warm, wet air due to intense solar heating (C)</p> Signup and view all the answers

How does warm air move in the atmosphere according to the content?

<p>It descends at the equator and moves towards the poles at high altitudes (A)</p> Signup and view all the answers

What causes deep ocean currents to aid in transferring heat globally?

<p>Coriolis effect due to Earth's rotation (C)</p> Signup and view all the answers

Which atmospheric phenomena occur during solstices according to the information provided?

<p>Maximal tilting of one hemisphere towards or away from the Sun (D)</p> Signup and view all the answers

How do subtropical high-pressure zones influence atmospheric conditions over deserts?

<p>By producing hot, dry air that leads to arid landscapes (B)</p> Signup and view all the answers

What role does atmospheric circulation play in redistributing heat across Earth's surface?

<p>Conveying heat from surplus areas to deficit areas (B)</p> Signup and view all the answers

Why do polar regions lose more energy than they gain according to the text?

<p>Because they receive less direct sunlight than the Equator (B)</p> Signup and view all the answers

What drives warm surface currents from the tropics towards polar regions?

<p>Coriolis effect caused by Earth's rotation (A)</p> Signup and view all the answers

Where are subtropical high-pressure zones predominantly located based on atmospheric pressure belts?

<p>Between 20°-35° N and S latitude (A)</p> Signup and view all the answers

What process significantly alters the landscape over millions of years by reducing extensive plateaus to isolated landforms?

<p>Scarp retreat (C)</p> Signup and view all the answers

What is the primary reason why the Karoo region's landscapes are generally unsuitable for agriculture?

<p>Lack of rainfall (D)</p> Signup and view all the answers

Which type of intrusive body is characterized by wall-like intrusions cutting across existing strata?

<p>Dykes (D)</p> Signup and view all the answers

What geological process gradually transforms original plateaus into landforms like mesas and buttes over time?

<p>Erosion (C)</p> Signup and view all the answers

What is a key characteristic of granite domes and tors that distinguishes them as prominent geological features?

<p>Rounded shape (D)</p> Signup and view all the answers

Which intrusive body type is characterized by mushroom-shaped intrusions pushing overlying strata upwards?

<p>Laccoliths (D)</p> Signup and view all the answers

What is the primary factor in the formation of massive igneous rocks according to the text?

<p>Magma cooling and solidifying (C)</p> Signup and view all the answers

Which type of intrusive body is characterized by horizontal layers formed as magma spreads out between existing rock layers?

<p>Sills (A)</p> Signup and view all the answers

What key process contributes significantly to shaping distinctive landscapes like those found in the Karoo region?

<p>Vertical erosion (B)</p> Signup and view all the answers

What plays a crucial role in the development of various landforms from original plateaus, according to the provided text?

<p>Erosional processes (D)</p> Signup and view all the answers

What key geological process leads to the distinctive rock shapes and rounded boulders found in tors?

<p>Expansion of vertical joints in rocks during cooling (B)</p> Signup and view all the answers

Which intrusive body type is characterized by wall-like intrusions that cut across existing strata, usually vertically?

<p>Dykes (A)</p> Signup and view all the answers

What plays a significant role in shaping the landscape by pushing overlying strata upwards to create distinct dome-like shapes, as seen in laccoliths?

<p>Magma intruding between sedimentary layers (D)</p> Signup and view all the answers

What distinctive feature makes batholiths stand out among the various types of intrusive bodies associated with massive igneous rocks?

<p>Granite composition and extensive landforms (C)</p> Signup and view all the answers

How do sills differ from dykes in terms of their orientation and formation within existing rock layers?

<p>Sills form horizontally, while dykes cut across strata vertically. (D)</p> Signup and view all the answers

What is the primary factor influencing the landscape in regions with extensive massive igneous rock formations, such as granite?

<p>Cooling and solidification of magma underground (C)</p> Signup and view all the answers

How do granite domes become exposed at the surface over time?

<p>By gradual removal of overlying material due to weathering and erosion (D)</p> Signup and view all the answers

What distinguishes tors from granite domes in terms of their rock formations?

<p>Tors are characterized by rounded boulders, while granite domes are smooth and rounded. (A)</p> Signup and view all the answers

What leads to the formation of saucer-shaped intrusions known as lopoliths?

<p>Magma intruding between sedimentary layers causing lower layer sinking (D)</p> Signup and view all the answers

What process gradually exposes granite domes at the Earth's surface over time?

<p>Gradual removal of overlying material due to erosion and weathering (A)</p> Signup and view all the answers

Why do regions near the equator experience higher temperatures compared to areas near the poles?

<p>The Sun's rays strike the equator more directly, leading to higher energy absorption. (A)</p> Signup and view all the answers

How does the angle at which the Sun's rays strike the Earth's surface affect energy absorption and temperature distribution?

<p>A direct angle at the equator results in higher energy absorption. (A)</p> Signup and view all the answers

What role does ice and snow play in affecting energy absorption in regions near the poles?

<p>Ice and snow reflect solar radiation back into space, reducing energy absorption. (C)</p> Signup and view all the answers

How does the Earth's surface contribute to atmospheric heating?

<p>It absorbs high-energy, short-wave radiation and re-radiates it as lower-energy infrared radiation. (B)</p> Signup and view all the answers

What drives the atmospheric and oceanic circulation patterns that transport heat across the planet?

<p>Unequal heating due to variations in solar radiation intensity. (D)</p> Signup and view all the answers

What happens when the Sun's rays strike the Earth at a more oblique angle at higher latitudes?

<p>Energy absorption decreases due to the direct angle of incidence. (B)</p> Signup and view all the answers

What process widens valleys through lateral erosion, mass movement, and weathering?

<p>Scarp retreat (A)</p> Signup and view all the answers

Which type of intrusive body is characterized by pushing overlying strata upwards to create a dome-like shape?

<p>Laccoliths (B)</p> Signup and view all the answers

What distinguishes granite domes from tors?

<p>Shape and size (D)</p> Signup and view all the answers

What type of rocks are characterized by layers formed from the deposition of materials over time?

<p>Sedimentary rocks (D)</p> Signup and view all the answers

What is the primary factor influencing the formation of high and low-pressure cells?

<p>Differential heating of land and water (C)</p> Signup and view all the answers

Which type of landforms can be created by scarp retreat over millions of years?

<p>Mesas (A)</p> Signup and view all the answers

Which region is famous for its extensive arid landscapes in South Africa?

<p>Great Karoo (A)</p> Signup and view all the answers

What is the primary factor influencing the formation of intrusive igneous rock bodies?

<p>Magma solidification (C)</p> Signup and view all the answers

Which type of intrusive body is characterized by cutting across existing strata, usually vertically?

<p>Dykes (D)</p> Signup and view all the answers

What drives the Monsoon Winds characterized by seasonal reversals in wind direction?

<p>Differential heating of land and water (B)</p> Signup and view all the answers

What plays a pivotal role in shaping landscapes associated with horizontally layered rocks?

<p>Geological structures and climate interaction (B)</p> Signup and view all the answers

What distinguishes the Ferrel Cell from other global air circulation cells?

<p>Affects temperate weather patterns (A)</p> Signup and view all the answers

What effect does the Coriolis Force have on wind direction in the Northern Hemisphere?

<p>Causes deflection to the right (B)</p> Signup and view all the answers

'Batholiths' are usually composed of which type of rock?

<p>Granite (B)</p> Signup and view all the answers

Which feature does most igneous rock lack compared to sedimentary rocks?

<p>Layers (B)</p> Signup and view all the answers

Where is the Polar High Pressure Zone primarily located?

<p>90° N and S (B)</p> Signup and view all the answers

What characterizes a Föhn wind?

<p>Dry, warm downslope winds (D)</p> Signup and view all the answers

Jet Streams significantly influence which weather patterns?

<p><strong>Storm tracks and temperature distributions</strong> (A)</p> Signup and view all the answers

Subsidence plays a significant role in determining dry seasons in Africa, especially in areas located where?

<p><strong>North of the Intertropical Convergence Zone (ITCZ)</strong> (C)</p> Signup and view all the answers

Which process drives wind from high to low-pressure areas?

<p>Pressure Gradient (B)</p> Signup and view all the answers

What is the primary process responsible for the formation of tors?

<p>Chemical weathering (C)</p> Signup and view all the answers

Which physiographic region in South Africa is known for its grassland ecosystem?

<p>The Central Highveld (D)</p> Signup and view all the answers

What characterizes a convex slope?

<p>Resembles the exterior of a sphere (D)</p> Signup and view all the answers

What is the distinctive feature of granite domes as opposed to tors?

<p>Intricate folding patterns (C)</p> Signup and view all the answers

Which type of slope is known for having a uniform gradient?

<p>Regular Slope (C)</p> Signup and view all the answers

What major geological process contributes to the shaping of South Africa's physiographic regions?

<p>Tectonic forces and folding (B)</p> Signup and view all the answers

What type of drought is characterized by the depletion of water reserves?

<p>Hydrological Drought (C)</p> Signup and view all the answers

Which region experiences the most significant frequency of droughts?

<p>Sahel region in Africa (D)</p> Signup and view all the answers

What is the primary cause of desertification as explained in the text?

<p>Human activities and climatic changes (D)</p> Signup and view all the answers

Which climatic phenomenon is characterized by stronger trade winds and upwelling of cold water in the Pacific Ocean?

<p>La Niña (C)</p> Signup and view all the answers

What type of areas are classified based on their aridity levels into hyperarid, arid, semiarid, and dry subhumid zones?

<p>Drylands (C)</p> Signup and view all the answers

Which ocean currents contribute to dry and arid conditions in the Namib Desert?

<p>Benguela and Canary currents (C)</p> Signup and view all the answers

What do synoptic weather maps use lines connecting points of equal atmospheric pressure to represent?

<p>Wind direction (B)</p> Signup and view all the answers

'Socio-economic Drought' specifically impacts which aspect of society and economy?

<p>$H_2O$ demands (B)</p> Signup and view all the answers

'Hydrological Drought' is characterized by the deficiency of which natural resource?

<p>$H_2O$ (A)</p> Signup and view all the answers

What role do ocean currents play in influencing Africa's climate?

<p>Modifying temperatures over land (B)</p> Signup and view all the answers

What is the primary purpose of global air circulation?

<p>To evenly distribute thermal energy, air, and water across the Earth (C)</p> Signup and view all the answers

How do equinoxes differ from solstices in terms of sunlight distribution?

<p>Equinoxes mark periods with the Sun directly over the equator (B)</p> Signup and view all the answers

What is the main driver of atmospheric circulation according to the text?

<p>Unequal heating of the Earth's surface (A)</p> Signup and view all the answers

Which zone is characterized by warm, wet air due to intense solar heating and consistent daylight?

<p>The Equatorial Low Pressure Zone (B)</p> Signup and view all the answers

How do warm surface currents contribute to global heat transfer?

<p>They transfer heat from the tropics towards the poles (C)</p> Signup and view all the answers

What drives the movement of warm air towards the poles at high altitudes in the atmosphere?

<p>Unequal heating at the equator (B)</p> Signup and view all the answers

In which latitudinal zone are subtropical high-pressure zones predominantly located?

<p>Between 20° and 35° N and S (D)</p> Signup and view all the answers

What causes deep ocean currents to assist in transferring heat globally?

<p>Coriolis effect due to Earth's rotation (A)</p> Signup and view all the answers

How are atmospheric pressure belts represented on maps according to the text?

<p>'Isobars' representing lines of equal atmospheric pressure (B)</p> Signup and view all the answers

What geological process primarily leads to the development of hilly landscapes?

<p>Mass wasting and sheet erosion (D)</p> Signup and view all the answers

Why do basaltic plateaus accumulate to significant depths over millions of years?

<p>Through extensive lava flows (D)</p> Signup and view all the answers

What aspect defines canyon landscapes and distinguishes them from other landscape types?

<p>Erosion at different rates of horizontal rock layers (C)</p> Signup and view all the answers

Which factor contributes significantly to the formation of Karoo landscapes?

<p>Processes similar to canyon landscapes (C)</p> Signup and view all the answers

What environmental aspect plays a crucial role in the development of hilly landscapes?

<p>High levels of precipitation (D)</p> Signup and view all the answers

How does the resistance of rocks contribute to the formation of prominent hills within hilly landscapes?

<p>By preventing complete erosion (C)</p> Signup and view all the answers

What distinguishes basaltic plateaus from other landscape types like hilly landscapes?

<p>Accumulation of extensive lava flows (B)</p> Signup and view all the answers

Which factor is NOT a common characteristic between hilly and canyon landscapes?

<p>'U' shaped valleys (B)</p> Signup and view all the answers

Why do basaltic plateaus often become major tourist attractions in regions like South Africa?

<p>For their dramatic scenery and unique geological structures (A)</p> Signup and view all the answers

What differentiates canyon landscapes in terms of their development compared to basaltic plateaus?

<p>River erosion exploiting weaknesses in surface layers (C)</p> Signup and view all the answers

How are granite domes primarily formed?

<p>From the cooling and solidification of magma beneath the Earth's surface (C)</p> Signup and view all the answers

What geological process is largely responsible for the formation of tors?

<p>Chemical weathering below the surface (B)</p> Signup and view all the answers

Which intrusive body type is characterized by wall-like intrusions cutting across existing strata?

<p>Dykes (B)</p> Signup and view all the answers

What distinguishes massive igneous rocks from sedimentary rocks in terms of formation?

<p>Sedimentary rocks are deposited over time, while igneous rocks solidify from magma. (A)</p> Signup and view all the answers

What is the key factor that influences the landscape in regions with extensive massive igneous rock formations?

<p>Erosion and weathering processes (A)</p> Signup and view all the answers

Which type of intrusive body is characterized by saucer-shaped intrusions formed between sedimentary layers?

<p>Lopoliths (C)</p> Signup and view all the answers

What is a distinctive feature of tors in terms of their rock formations?

<p>Piles of core stones appearing stacked (A)</p> Signup and view all the answers

How do sills differ from dykes in terms of their orientation within existing rock layers?

<p>Sills form horizontal layers between existing rock layers, unlike dykes. (D)</p> Signup and view all the answers

What role do batholiths play in the landscape when exposed on the surface?

<p>Extensive landforms on the surface (C)</p> Signup and view all the answers

What is the primary reason for the variation in temperatures between near the equator and higher latitudes?

<p>Variances in the angle at which the Sun's rays strike the Earth's surface (C)</p> Signup and view all the answers

Why do regions near the poles experience cooler temperatures compared to areas near the equator?

<p>Less energy absorption due to oblique sun rays and reflective ice properties (B)</p> Signup and view all the answers

How does the Earth's surface contribute to heating the atmosphere according to the text?

<p>By absorbing long-wave infrared energy and re-radiating it as lower energy, warming the atmosphere (D)</p> Signup and view all the answers

What role do reflective properties of ice and snow play in the energy balance near the poles?

<p>Reducing energy absorption by reflecting solar radiation back into space (A)</p> Signup and view all the answers

Why do regions near the equator have warmer temperatures compared to higher latitudes?

<p>As a result of direct sunlight leading to higher energy absorption (A)</p> Signup and view all the answers

What effect does the angle of solar radiation have on energy absorption between regions near the equator and at higher latitudes?

<p>It leads to higher energy absorption near the equator and lower absorption at higher latitudes (B)</p> Signup and view all the answers

What causes the movement of heat from areas of surplus to areas of deficit in the atmosphere?

<p>Air pressure and temperature differences (A)</p> Signup and view all the answers

What drives the movement of warm surface currents from the tropics towards the poles?

<p>Coriolis effect (B)</p> Signup and view all the answers

During which global air circulation process does warm air rise at the equator and move towards the poles?

<p>Hadley Cell (B)</p> Signup and view all the answers

Which region experiences cooler temperatures when it is tilted away from the Sun?

<p>Polar regions (D)</p> Signup and view all the answers

What influences the movement of deep ocean currents that assist in global heat transfer?

<p>Differences in water density related to temperature and salinity (C)</p> Signup and view all the answers

Which area is characterized by intense solar heating and consistent daylight resulting in warm, wet air?

<p>Equatorial Low Pressure Zone (D)</p> Signup and view all the answers

What results in periods of equal day and night lengths globally on equinoxes?

<p>Earth's tilt relative to its orbit (A)</p> Signup and view all the answers

Where does warm air rise before moving towards higher latitudes in global air circulation?

<p>Equatorial zones (C)</p> Signup and view all the answers

Which zone is responsible for producing hot, dry air, particularly over deserts?

<p>Subtropical High Pressure Zone (B)</p> Signup and view all the answers

What is the primary driver of atmospheric heat transfer from the tropics to the poles?

<p>Differences in air pressure and temperature (D)</p> Signup and view all the answers

What is the primary impact of the convergence of moist air masses on regions like Calabar and Kano?

<p>High rainfall (B)</p> Signup and view all the answers

Which oceanic currents contribute to the dry and arid conditions in the Namib Desert?

<p>Canary and Humboldt currents (A)</p> Signup and view all the answers

What characterizes La Niña conditions in terms of Pacific Ocean temperatures?

<p>Stronger trade winds (B)</p> Signup and view all the answers

What are isobars on synoptic weather maps used to represent?

<p>Atmospheric pressure variations (C)</p> Signup and view all the answers

In dryland ecosystems, what category is characterized by the highest aridity level?

<p>Hyperarid areas (D)</p> Signup and view all the answers

What type of drought is defined by insufficient soil moisture affecting crops?

<p>Agricultural drought (B)</p> Signup and view all the answers

'Meteorological Drought' is characterized by what specific condition?

<p>Below-average rainfall (B)</p> Signup and view all the answers

'Desertification' primarily results from which factors?

<p>'Human activities' and 'climatic changes' (D)</p> Signup and view all the answers

'Drought' affects all continents with notable long-term occurrences in regions like:

<p>'Sahel region in Africa' (C)</p> Signup and view all the answers

'Ocean Currents' influence Africa's climate by modifying temperatures over land through:

<p>'Warm and cold currents' (A)</p> Signup and view all the answers

What geological process contributes to the formation of tors?

<p>Chemical weathering (C)</p> Signup and view all the answers

Which physiographic region in South Africa is known for its semi-arid landscapes?

<p>The Great Karoo Basin (A)</p> Signup and view all the answers

What is a key characteristic of a concave slope?

<p>Curves outward (A)</p> Signup and view all the answers

What is the distinctive feature of South Africa's topography from west to east?

<p>Gradual ascent in elevation (B)</p> Signup and view all the answers

What distinguishes a regular slope from a convex slope?

<p>Curving outward (C)</p> Signup and view all the answers

What contributes to the distinctive rock shapes and rounded boulders found in tors?

<p>Chemical weathering (A)</p> Signup and view all the answers

What is the primary factor contributing to the dry seasons experienced in areas like Kano (Nigeria) and Atar (Mauritania)?

<p>Intertropical Convergence Zone (ITCZ) (B)</p> Signup and view all the answers

In the Southern Hemisphere, which direction does air typically rise in low pressure cells?

<p>Counter-clockwise (B)</p> Signup and view all the answers

What is the driving force behind wind movement from high to low-pressure areas?

<p>Pressure Gradient (B)</p> Signup and view all the answers

Which global air circulation cell influences temperate weather patterns by acting as a transitional zone?

<p>Ferrel Cell (C)</p> Signup and view all the answers

What significant role do jet streams play in influencing weather patterns?

<p>Affecting storm tracks and temperature distributions (C)</p> Signup and view all the answers

Which large-scale wind system is characterized by seasonal reversals in direction, impacting dry and wet seasons?

<p>Monsoon Winds (A)</p> Signup and view all the answers

'Harmattan winds' significantly impact weather conditions in which African regions?

<p>Northern Africa (C)</p> Signup and view all the answers

What is the primary consequence of desertification at a local and national level?

<p>Threatening food security (D)</p> Signup and view all the answers

Which factor significantly influences the development of hilly landscapes?

<p>High temperatures promoting chemical weathering (B)</p> Signup and view all the answers

What distinguishes basaltic plateaus from hilly landscapes?

<p>Extensive lava flows accumulation (C)</p> Signup and view all the answers

Which landscape type is characterized by initially flat lands being incised by rivers exploiting weaknesses in rock layers?

<p>Canyon landscapes (D)</p> Signup and view all the answers

What is the primary challenge in rehabilitating already degraded lands?

<p>Challenging and expensive nature (C)</p> Signup and view all the answers

How do Karoo landscapes evolve according to the provided text?

<p>From processes similar to canyon landscapes (B)</p> Signup and view all the answers

What is a distinguishing feature of canyon landscapes compared to Karoo landscapes?

<p>Valleys formed by rivers exploiting weaknesses in rock layers (D)</p> Signup and view all the answers

How are horizontally layered rocks deposited according to the text?

<p>In a flat or nearly flat position (D)</p> Signup and view all the answers

What feature characterizes Drakensberg as a remnant of a vast basaltic plateau?

<p>Depths of hundreds or even thousands of meters from lava flows accumulation (B)</p> Signup and view all the answers

What is the primary process that leads to the unique rock formations known as tors?

<p>Expanding rock joints due to cooling and percolating water (A)</p> Signup and view all the answers

Which type of intrusive body is characterized by a saucer-shaped intrusion between sedimentary layers?

<p>Lopoliths (D)</p> Signup and view all the answers

How do granite domes primarily become exposed at the surface?

<p>By extensive erosion and weathering (B)</p> Signup and view all the answers

What distinguishes a laccolith from other intrusive bodies?

<p>Mushroom-shaped intrusions (C)</p> Signup and view all the answers

What is the process that widens valleys through lateral erosion, mass movement, and weathering?

<p>Scarp retreat (D)</p> Signup and view all the answers

What is the primary factor that differentiates massive igneous rocks from sedimentary rocks?

<p>Formation in layers over time (A)</p> Signup and view all the answers

What type of landform is created when magma intrudes between sedimentary layers, causing the lower layer to sink?

<p>Lopoliths (C)</p> Signup and view all the answers

Which key concept is fundamental in the study of physical geography and geology related to intrusive igneous rock bodies?

<p>Cooling and solidification of magma below the surface (A)</p> Signup and view all the answers

What role does weathering play in the exposure of granite domes and tors?

<p>Gradual removal of overlying material (D)</p> Signup and view all the answers

Which intrusive body is characterized by chimney-shaped intrusions that can transport magma from deep sources to near the surface?

<p>Pipes (D)</p> Signup and view all the answers

How do batholiths differ from laccoliths in terms of their size and composition?

<p>Batholiths are larger and composed of granite (D)</p> Signup and view all the answers

What distinctive feature characterizes granite domes?

<p>Rounded smoothness (C)</p> Signup and view all the answers

Which type of rock formation is primarily formed when magma cools and solidifies below the Earth's surface?

<p>Igneous rocks (A)</p> Signup and view all the answers

How do sills differ from dykes in terms of their orientation within rock layers?

<p>Sills cut horizontally across existing strata, while dykes form vertical intrusions. (B)</p> Signup and view all the answers

What is the key characteristic of batholiths among intrusive bodies associated with massive igneous rocks?

<p>Extensive landforms (A)</p> Signup and view all the answers

What is the primary cause of formation for chimney-shaped intrusive bodies known as pipes?

<p>Transportation of magma from deep sources to near the surface (C)</p> Signup and view all the answers

Which process significantly alters a landscape by reducing once extensive plateaus to isolated, smaller landforms like mesas?

<p><strong>Scarp retreat</strong> (B)</p> Signup and view all the answers

What geomorphological element is primarily shaped by mass movement?

<p>The Free Face (D)</p> Signup and view all the answers

Which slope element is likely to be smooth and characterized by deposition?

<p>The Talus (D)</p> Signup and view all the answers

What process leads to the widening of the pediment over time?

<p>Parallel slope retreat (D)</p> Signup and view all the answers

In areas with alternating layers of hard and soft rock, what may happen to the distinct features of slopes?

<p>They repeat (B)</p> Signup and view all the answers

Which theory explains slope erosion by suggesting that slopes maintain their angle and length over time?

<p>Parallel slope retreat theory (B)</p> Signup and view all the answers

What characteristic distinguishes a pediment from other geomorphological elements at the base of a slope?

<p>Concave shape (D)</p> Signup and view all the answers

What phenomenon encompasses the downward and outward movement of soil, rock, and other debris on a slope?

<p>Mass movement (A)</p> Signup and view all the answers

What type of mass movement involves the imperceptibly slow downhill movement of soil?

<p>Soil creep (C)</p> Signup and view all the answers

Which natural event can significantly alter the stability of slopes, leading to mass movements?

<p>Earthquakes (D)</p> Signup and view all the answers

What mitigation strategy aims to enhance slope stability by increasing soil cohesion through root systems?

<p>Vegetation planting (A)</p> Signup and view all the answers

What type of mass movement involves highly fluid, rapid flows of mud, usually initiated following intense rainfall?

<p>Mud flows (A)</p> Signup and view all the answers

Which human activity can increase the vulnerability of slopes to mass movements?

<p>Deforestation (D)</p> Signup and view all the answers

What type of mass movement involves the downward and outward rotational movement of slope material?

<p>Slumps (A)</p> Signup and view all the answers

What characterizes the free face of a slope according to the provided text?

<p>It is too steep for loose material to accumulate (B)</p> Signup and view all the answers

Which element at the base of a slope is primarily characterized by deposition?

<p>The Talus (D)</p> Signup and view all the answers

What theory explains slope development by suggesting that slopes erode while maintaining their angle and length over time?

<p>Parallel Slope Retreat Theory (C)</p> Signup and view all the answers

What is the distinctive characteristic of the pediment at the base of a slope?

<p>It is a concave plain shaped mainly by erosion from running water (B)</p> Signup and view all the answers

In geomorphological processes, which element of a slope is usually convex and where weathering and soil creep are predominant?

<p>The Crest (A)</p> Signup and view all the answers

What term is used interchangeably with 'mass movement' in the text?

<p>Gravity shift (D)</p> Signup and view all the answers

Which of the following is NOT listed as a triggering event for mass movement in the text?

<p>Strong winds (B)</p> Signup and view all the answers

What type of mass movement involves highly fluid, rapid flows of mud?

<p>Mud flows (D)</p> Signup and view all the answers

Which mitigation strategy focuses on increasing soil cohesion through root systems?

<p>Vegetation Planting (C)</p> Signup and view all the answers

What is a characteristic environmental impact of mass movements described in the text?

<p>Formation of natural dams and lakes due to landslides (C)</p> Signup and view all the answers

Solifluction, a type of mass movement, is characteristic of which type of climate?

<p>Cold climates (C)</p> Signup and view all the answers

'Slumps' involve which type of movement of slope material?

<p>Rotational movement (B)</p> Signup and view all the answers

'Rock Falls' primarily occur due to which two factors mentioned in the text?

<p>Weathering and erosion (D)</p> Signup and view all the answers

'Landslides' are most commonly triggered by which environmental factor?

<p>'Heavy rains' (C)</p> Signup and view all the answers

What human impact is NOT mentioned in relation to mass movement in the text?

<p>Economic damages from volcanic eruptions (C)</p> Signup and view all the answers

What is the role of the pediment in a slope?

<p>It is located at the base of the free face and is characterized by deposition (C)</p> Signup and view all the answers

Which element of a slope is primarily shaped by erosion from running water?

<p>The Pediment (A)</p> Signup and view all the answers

In geomorphological processes, which element of a slope is usually convex and where weathering and soil creep are predominant?

<p>The Crest (C)</p> Signup and view all the answers

What theory explains the widening of the pediment over time?

<p>Parallel slope retreat theory (D)</p> Signup and view all the answers

Which element of a slope is characterized by being almost vertical and shaped by mass movement?

<p>The Free Face (C)</p> Signup and view all the answers

What element of a slope is located at the base of the free face and is smoother due to deposition?

<p>The Talus (A)</p> Signup and view all the answers

What is the primary factor that can destabilize a slope and lead to mass movement?

<p>Earthquakes (D)</p> Signup and view all the answers

Which type of mass movement is characteristic of cold climates and involves the slow flow of water-saturated soil over impermeable materials?

<p>Solifluction (C)</p> Signup and view all the answers

What is a major environmental impact of mass movement that contributes to natural erosion processes?

<p>Redistribution of materials downhill (C)</p> Signup and view all the answers

Which mitigation strategy for mass movement involves enhancing slope stability by increasing soil cohesion through root systems?

<p>Vegetation Planting (C)</p> Signup and view all the answers

What type of mass movement involves the free-fall, bouncing, or rolling of individual rocks from steep slopes?

<p>Rock Falls (B)</p> Signup and view all the answers

How do heavy rains contribute to mass movement?

<p>By increasing soil weight and reducing internal cohesion (D)</p> Signup and view all the answers

What human activity can increase the vulnerability of slopes and precipitate mass movement?

<p>Deforestation (A)</p> Signup and view all the answers

Which type of mass movement involves highly fluid, rapid flows of mud typically initiated in arid or semi-arid areas following intense rainfall?

<p>Mud Flows (B)</p> Signup and view all the answers

What is one of the impacts of mass movement that affects biodiversity due to the destruction of vegetation and habitats?

<p>Loss of life (A)</p> Signup and view all the answers

How does undercutting by natural forces contribute to mass movement?

<p>By eroding the base of a slope leading to potential collapse (D)</p> Signup and view all the answers

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