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Questions and Answers

What does the term 'absolute location' refer to?

The exact location of a place on Earth, as described by global coordinates.

Define 'relative location'.

The position of a place in relation to another place.

What is 'place' in geographical terms?

A specific point on Earth distinguished by a particular character.

Explain the concept of 'region'.

<p>An area distinguished by a unique combination of trends or features.</p> Signup and view all the answers

What does 'movement' signify in geography?

<p>The flow of things, people, and ideas.</p> Signup and view all the answers

Describe 'human-earth relationships'.

<p>The complex web of multiway relationships between people and their impact on the environment.</p> Signup and view all the answers

Define 'process' in a geographical context.

<p>A set of actions or mechanisms that combine to create equilibrium, which can be changed under extreme stress.</p> Signup and view all the answers

What is 'systems' in geography?

<p>A collection of subsystems that combine to create equilibrium, which can be changed under extreme stress.</p> Signup and view all the answers

What is a 'positive feedback loop?'

<p>A feedback loop in which change in a system is amplified.</p> Signup and view all the answers

What is 'Pleistocene'?

<p>The last major Ice Age, beginning about 2.6 million years ago and ending about 11,700 years ago.</p> Signup and view all the answers

What is 'Holocene'?

<p>The geological era since the end of the Great Ice Age about 11,000 years ago. The moderate climate has supported the massive agricultural revolution.</p> Signup and view all the answers

Define 'Cartography'.

<p>The science or art of making maps.</p> Signup and view all the answers

What is 'distortion' in cartography?

<p>A change in the shape, size, or position of a place when it is shown on a map.</p> Signup and view all the answers

What is 'scale' in cartography?

<p>The ratio of a distance on the map to the corresponding distance on the ground.</p> Signup and view all the answers

What is 'operational scale'?

<p>Scale where social or natural processes play out and are investigated at a certain level of analysis.</p> Signup and view all the answers

What is the 'Mercator Projection'?

<p>A map projection of the earth onto a cylinder. Accurately shows shape and direction.</p> Signup and view all the answers

Explain the 'Gall-Peters Projection'.

<p>A map projection that shows the relative sizes of the earth's continents accurately (equal area). Distorts the shape.</p> Signup and view all the answers

Describe the 'Goode Homolosine Projection'.

<p>A 20th-century map of Earth with equal area of landmasses but interruptions of the oceans to more accurately represent a 'flattened' sphere.</p> Signup and view all the answers

What is an 'Azimuthal Projection'?

<p>A map projection in which a region of the earth is projected onto a plane tangential to the surface, typically at a pole or the equator.</p> Signup and view all the answers

What is a 'Tissot's Indicatrix'?

<p>Circles used to visualize distortions due to map projection. These circles are equal in area before projection, but distorted afterwards.</p> Signup and view all the answers

What is 'GPS'?

<p>A system that accurately determines the absolute location of something on Earth using triangulation.</p> Signup and view all the answers

What is 'remote sensing?'

<p>The acquisition of data about Earth's surface from satellite and aerial imagery.</p> Signup and view all the answers

Define 'Aphelion' in relation to Earth's orbit.

<p>The place in Earth's orbit where Earth is farthest away from the sun. Occurs on July 4 and is approximately 94.5 million miles away from the sun.</p> Signup and view all the answers

What is 'Perihelion'?

<p>The place in Earth's orbit where Earth is closest to the sun. Occurs on January 3 and is approximately 91.5 million miles away from the sun.</p> Signup and view all the answers

What is the 'speed of light?'

<p>300,000 km/sec (186,000 miles/sec).</p> Signup and view all the answers

Define 'solar cycle'.

<p>Periodic variation in the Sun's magnetic activity and appearance over time.</p> Signup and view all the answers

What are 'sunspots'?

<p>Dark areas of the Sun's surface, which are cooler than surrounding areas caused by magnetic storms.</p> Signup and view all the answers

What is a 'solar minimum'?

<p>When sunspot activity is at its lowest.</p> Signup and view all the answers

What is 'solar maximum?'

<p>When sunspot activity is at its highest.</p> Signup and view all the answers

What is the 'Corona'?

<p>The outermost layer of the Sun's atmosphere.</p> Signup and view all the answers

What is the 'Magnetosphere'?

<p>The area surrounding Earth that is influenced by Earth's magnetic field.</p> Signup and view all the answers

What is 'Electromagnetic energy?'

<p>All energy traveling in waves through space. Includes light, heat, x-rays, radar, and radio waves; classified by wavelength.</p> Signup and view all the answers

What is 'insolation'?

<p>Incoming solar radiation.</p> Signup and view all the answers

Define the 'solar constant.'

<p>The average insolation received at the top of the atmosphere when Earth is at its average distance from the Sun.</p> Signup and view all the answers

What is a 'subsolar point'?

<p>The point on Earth where the sun angle is 90° and solar radiation strikes the surface most directly at any given point in time (only occurs in the tropics.</p> Signup and view all the answers

What is 'global net radiation'?

<p>Total incoming radiation minus outgoing radiation: positive in the tropics; negative at the poles. Imbalances drive circulation.</p> Signup and view all the answers

What is 'sun altitude?'

<p>Position of the sun relative to the horizon.</p> Signup and view all the answers

What is meant by 'solar noon?'

<p>Time of day when sun is highest in the sky.</p> Signup and view all the answers

Explain what 'sun declination' is?

<p>Latitude of the subsolar point. Migrates between the Tropic of Cancer (23.5°N, June solstice) and the Tropic of Capricorn (23.5°S, December solstice). At the Equator at equinoxes (March and September).</p> Signup and view all the answers

What is a 'circle of illumination'?

<p>The dividing line between day and night.</p> Signup and view all the answers

What is an 'ecliptic?'

<p>Plan of orbit which Earth follows.</p> Signup and view all the answers

What is meant by 'axial tilt?'

<p>The angle at which a planet's axis tilts (23.5 degrees).</p> Signup and view all the answers

What are the different layers of the atmosphere?

<p>Troposphere, stratosphere, mesosphere, thermosphere, exosphere.</p> Signup and view all the answers

What is 'air pressure?'

<p>The force exerted by the mass and motion of air particles. Lower at high altitudes, high temperatures, and high humidity.</p> Signup and view all the answers

What is 'atmospheric pressure?

<p>Force exerted on Earth's surface by the weight of the air above it.</p> Signup and view all the answers

Define 'Heteroshpere.'

<p>The upper layer of Earth's atmosphere, which exists higher than roughly 80 kilometers (50 miles) above sea level, where the gases are layered by atomic weight.</p> Signup and view all the answers

What are the 'constant gases' of the atmosphere?

<p>Nitrogen (78%), oxygen (21%), argon (.9%).</p> Signup and view all the answers

What are the 'variable gases' of the atmosphere?

<p>Water vapor, carbon dioxide.</p> Signup and view all the answers

What is the 'greenhouse effect?'

<p>Causes the atmosphere to hold onto solar radiation and keeps the Earth warm. Caused by natural and human-accelerated changes, overall causing the Earth to warm.</p> Signup and view all the answers

What are the 'anthropogenic greenhouse gases'?

<p>Carbon dioxide (77%), methane (14%), and nitrous oxide (8%). They absorb infrared heat radiating from the earth and heat the lower atmosphere.</p> Signup and view all the answers

What is the 'ozone layer?'

<p>A layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun.</p> Signup and view all the answers

What are some examples of 'natural pollution?'

<p>Forest fires, dust storms, volcanoes, earthquakes.</p> Signup and view all the answers

Provide examples of 'anthropogenic pollution.'

<p>Photochemical smog (automobile exhaust; high in Nitrogen oxides), Industrial smog (high in CO2, particulates, and Sulfur oxides), aerosol, and soot.</p> Signup and view all the answers

Define 'aerosol.'

<p>Solid or liquid particles suspended in gas.</p> Signup and view all the answers

What is meant by 'transmission' in relation to energy?

<p>The unimpeded movement of electromagnetic energy through a medium such as air, water, or glass.</p> Signup and view all the answers

What is 'scattering' of energy?

<p>Caused by particles in the atmosphere intercepting and changing the direction of radiation.</p> Signup and view all the answers

What is 'diffuse radiation?'

<p>The energy that reaches the Earth's surface after it has been scattered.</p> Signup and view all the answers

What is 'refraction'?

<p>Bending of radiation as it passes through a medium.</p> Signup and view all the answers

What is a 'mirage'?

<p>Caused by light waves being refracted by different layers of air at different temperatures and densities.</p> Signup and view all the answers

What is 'Rayleigh scattering'?

<p>Gas molecules scattering shorter wavelengths more than long wavelengths, causing the sky to appear blue.</p> Signup and view all the answers

What is 'Mie scattering?'

<p>Scattering by particles that are larger than visible wavelengths, causing the sky to appear white.</p> Signup and view all the answers

What is 'albedo?'

<p>The ability of a surface to reflect light. Lower sun altitude=more absorption.</p> Signup and view all the answers

Study Notes

Five Themes of Geography

  • Location: Exact location described by global coordinates or relative location in relation to another place.
  • Place: A specific point on Earth distinguished by a unique characteristic.
  • Region: An area with a unique combination of trends or features.
  • Movement: The flow of things, people, and ideas.
  • Human-Earth Relationships: The impacts of the environment on people and their impact on the environment.

Systems

  • Systems: A collection of subsystems that combine to create equilibrium, which can be changed under extreme stress.
  • Positive Feedback Loop: A feedback loop where changes in a system are amplified.
  • Negative Feedback Loop: A feedback loop where changes in a system are decreased or return to the original state.

Time Periods

  • Pleistocene: The last major Ice Age, from 2.6 million years ago to about 11,700 years ago.
  • Holocene: The geological epoch since the end of the Great Ice Age, about 11,000 years ago.
  • Anthropocene: A proposed modern geological epoch during which humans have significantly affected the environment, resulting from large populations and technological advancements.

Geography

  • Cartography: The science or art of mapmaking.
  • Distortion: Changes in shape, size, or position of a place when shown on a map.
  • Scale: The ratio of a map distance to the corresponding ground distance.
  • Operational Scale: The scale at which social or natural processes are investigated.
  • Mercator Projection: A map projection of the Earth onto a cylinder, accurately showing shape and direction, but distorting relative sizes.
  • Goode Homolosine Projection: A map projection that shows the relative sizes of continents accurately but interrupts the oceans to represent a sphere.

Earth's Systems

  • Gall-Peters Projection: A map projection that accurately shows the relative sizes of continents.
  • Azimuthal Projection: A map projection projecting a region of the Earth onto a plane that's tangent to a pole or the equator.
  • Tissot's Indicatrix: Circles used to visualize map projection distortions

Sun Characteristics & Variables

  • Aphelion: The point in Earth's orbit where it's furthest from the Sun (94.5 million miles).
  • Perihelion: The point in Earth's orbit where it's closest to the Sun (91.5 million miles).
  • Speed of Light: 300,000 km/sec (186,000 miles/sec).
  • Solar Cycle: Periodic variations in the Sun's magnetic activity and appearance (sunspots).
  • Solar Minimum: When sunspot activity is lowest
  • Solar Maximum: When sunspot activity is highest.
  • Corona: The outermost layer of the Sun's atmosphere.
  • Magnetosphere: The area surrounding Earth influenced by Earth's magnetic field.
  • Electromagnetic energy: All energy traveling in waves through space, including light, heat, x-rays, radar, and radio waves; classified by wavelength.

Atmosphere

  • Insolation: Incoming solar radiation.
  • Solar Constant: The average insolation received at the top of the atmosphere when Earth is at its average distance from the Sun.
  • Subsolar Point: The point on Earth where the Sun's rays strike vertically.
  • Global Net Radiation: The difference between incoming and outgoing radiation.
  • Sun Altitude: Position of the Sun relative to the horizon.
  • Solar Noon: The time of day when the Sun is highest in the sky
  • Sun Declination: Latitude of the subsolar point.
  • Circle of Illumination: The dividing line between day and night.
  • Ecliptic: The plane of Earth's orbit around the Sun..
  • Axial Tilt: The angle at which Earth's axis tilts (23.5 degrees).
  • Layers of the Atmosphere: Troposphere, stratosphere, mesosphere, thermosphere, exosphere.
  • Air pressure: The force exerted by the mass and motion of air particles (lower at higher altitudes)
  • Atmospheric Pressure: The force exerted on Earth's surface by the weight of the air above.
  • Heterosphere: The upper layer of Earth's atmosphere where gases are layered according to atomic weight.
  • Constant Gases: Nitrogen, Oxygen, and Argon
  • Variable Gases: Water vapor, and carbon dioxide.
  • Greenhouse Effect: The process by which greenhouse gases trap heat in the atmosphere.

Atmospheric processes

  • Transmission: Unimpeded movement of electromagnetic energy through a medium.
  • Scattering: The change in direction of radiation by particles in the atmosphere.
  • Diffuse Radiation: Energy that reaches the Earth's surface after being scattered.
  • Direct Radiation: Energy that reaches the Earth's surface unscattered
  • Refraction: Bending of radiation as it passes through a medium (mirage is an example).
  • Rayleigh Scattering: Gas molecules scattering shorter wavelengths more than longer wavelengths, causing the sky to appear blue.
  • Mie Scattering: Scattering by particles larger than visible wavelengths, causing the sky to appear white.
  • Albedo: The ability of a surface to reflect light. Lower sun altitude=more absorption.
  • Urban Heat Island (UHI): A metropolitan area that's significantly warmer than its surrounding rural areas due to human activities

Temperature and Pressure

  • Elevation: Height of a point on Earth's surface above sea level.
  • Altitude: Distance between an airborne object and Earth's surface; higher altitudes are generally colder.
  • Lapse Rate: The rate at which air temperature falls with increasing altitude.
  • Snowline: Elevation above which there is permanent snow.
  • Marine Effect: Slow heating and cooling of oceans keep coastal temperatures more stable
  • Continental Effect: Areas far from oceans have larger temperature ranges.
  • Cold Snap: A rapid decrease in temperature.
  • Heat Wave: A prolonged period of abnormally hot weather.
  • Wind Chill: Chilling caused by convection of heat away from the body in the presence of wind
  • Heat Index: A measure of how hot the temperature feels based on humidity.
  • Pressure Gradient Force (PGF): High-pressure (denser) air moving to areas of lower pressure, caused by uneven heating.
  • Isobar: A line on a weather map connecting points of equal atmospheric pressure
  • Coriolis Force: An apparent force that deflects air or water movement due to the Earth's rotation (right in the Northern Hemisphere and left in the Southern Hemisphere).
  • Friction Force: Resistance to wind flow near the ground.
  • Cyclone: The rotation of air inward toward a low-pressure point (counterclockwise in the Northern Hemisphere and clockwise in the Southern).
  • Primary Circulation: Air flow patterns at a continental scale
  • Secondary Circulation: Air flow patterns at regional or local scales.

Atmospheric Circulation

  • Hadley Cell: Convection currents that cycle between the equator and 30 degrees latitude North and South.
  • Ferrel Cell: A cell that moves air from 30 degrees to 60 degrees latitude.
  • Polar Cell: A weak circulation cell between 60 and 90 degrees latitude.
  • Primary Pressure Areas: Equatorial Low, Subtropical High, Subpolar Low, Polar High
  • Trade Winds: Reliable winds converging at the ITCZ.
  • Subtropical High: A belt of high pressure (approximately 30°N and 30°S), pushing air southward (and northward).
  • Westerlies: Dominant winds of the mid-latitudes, moving from west to east.
  • Subpolar Low: A belt of low air pressure at approximately 60°N and 60°S latitude, characterized by wet conditions and low temperatures.
  • Polar Front: Boundary where cold polar air meets warmer mid-latitude air.
  • Polar High: A dome of high pressure centered over the poles, characterized by cold and dry conditions.
  • Polar Easterlies: Weak, variable winds moving to in an anticyclonic direction.
  • Geostrophic Wind: A wind that moves parallel to the isobars (resulting from a balance between pressure-gradient force and the Coriolis effect).
  • Rossby Waves: Geostrophic winds along the polar front.
  • Jet Streams: Irregular, concentrated bands of westerly winds (occur at several levels).
  • Land and Sea Breezes: Local winds caused by different heating of land and water.

Other Atmospheric Processes

  • Rain Shadow Effect: A phenomenon where air cools and loses moisture on one side of a mountain, leading to arid conditions on the other side (leeward side).
  • Santa Ana Winds: Winds flowing over the Rockies to the West Coast.
  • Katabatic Winds: Gravity drainage winds that occur on a large scale, under certain conditions.
  • Monsoon: A rainy season where warm, moist air is pushed northward.
  • Oceanic Currents: Continuous flow of surface ocean water driven by wind, Coriolis effect, tides, density differences due to temp/salinity.
  • Gyres: The large, circular current patterns found in each ocean.
  • Equatorial Currents: Major currents parallel to the equator driven by weaker Coriolis effect
  • Subtropical Currents: Caused by gyres and are stronger, narrower, and deeper than their corresponding eastern boundary currents, due to the Coriolis Effect.
  • Upwelling: The movement of deep, cold, nutrient-rich water to the surface because of water being displaced by wind.
  • Thermohaline Circulation: An oceanic circulation pattern caused by temperature and salinity differences of water, moving large volumes of water around the globe (Global Conveyor Belt).
  • El Niño: A warm phase of oscillation every several years, negatively affecting the upwelling of nutrients, reducing nutrients along the coast.
  • La Niña: The opposite of El Niño, but is weaker and less consistent.

Water Cycle & Hydrologic Processes

  • Water Budget: The quantity of water within a stream that passes a given point during a set period of time, calculated by multiplying the stream width by stream depth by stream velocity.
  • Exotic Stream: A stream that originates elsewhere geographically and flows into an area with little or no precipitation
  • Hydrograph: A diagram showing the levels or amount of flow in a river over time.
  • Base Flow: Normal flow of a river with no precipitation
  • Hydraulic Action: The physical force of a flowing water erodes surrounding materials.
  • Abrasion: The process of grinding away of a rock by other rock materials carried within water, ice, or wind.
  • Dissolved Load: Dissolved materials in a stream like Sodium or Calcium (not visible).
  • Suspended Load: Small rocks and soil in suspension visible in the water-making it appear muddy.
  • Bed Load: Sediment carried by a stream along the bottom of its channel; includes traction and saltation
  • Traction: The dragging of larger bed load particles along the bottom of the river bed.
  • Saltation: The bouncing of smaller bed-load materials along the bottom of a river.
  • Degradation: Widening/deepening of a stream channel, occurring during high-flood flow.
  • Aggradation: Narrowing/shortening of a stream channel due to sediment deposits.
  • Stream Piracy: When one stream captures the headwaters of another stream.
  • Meandering Stream: A stream with a curving channel that forms loops (outer edges are steeper).
  • Point Bar: Deposit of sediment on the inside bend of a river; due to velocity changes, resulting in sedimentation.
  • Oxbow Lake: A formerly meandering channel that's cut off from the main river channel.
  • Graded Stream: A stream whose gradient is adjusted to carry its average sediment load.
  • Nickpoint: A point in a stream's longitudinal profile that experiences a rapid change in slope, often associated with waterfalls.
  • Watershed (Drainage Basin): The land area from which surface water drains into a particular river, lake, wetland, or other body of water

Soil

  • Soil Moisture Zone: The volume of water in soil available to plants.
  • Field Capacity: The maximum amount of water held by soil particles against gravity.
  • Surface Water Resources: Snow, Ice, Rivers, Lakes, Wetlands.
  • Snowpack: The accumulation of winter snowfall, especially in mountain or upland regions.
  • Base Flow: The sustained flow of a stream in the absence of direct runoff from rain or snowmelt
  • Aquifer: Underground layer of sand, gravel, or permeable rock that holds groundwater.
  • Artesian Water: Groundwater under pressure, rising above the surrounding water table.
  • Influent Source: A water supply source where the water table is lower than the stream, and the water feeds into it.
  • Effluent Source: A water supply source where the water table is higher than the stream, and the water flows from the water table into the stream.
  • Ground Water Mining: Removing groundwater from aquifers faster than it is replenished.
  • Cone of Depression: A lowering of the water table around a pumping well.
  • Soil Horizons: Distinct layers within a soil profile (O, A, E, B, C, R).
  • O Horizon: Organic horizon at the surface with organic matter
  • A Horizon: Topsoil layer that contains the most organic matter.
  • E Horizon: Layer where minerals have been dissolved and removed from the soil
  • B Horizon: Layer where minerals leached from the E horizon are deposited.
  • C Horizon: Layer composed of the weathered parent material, with little organic matter.
  • R Horizon: Layer of bedrock that underlies the other soil layers.
  • Mollisols: Grassland soils.
  • Alfisols: Moderately weathered forest soils.
  • Ultisols: Heavily weathered forest soils.
  • Soil Color: Portrays the chemical makeup of soils (-Iron Oxides, -Carbonates, Organic Matter).
  • Soil Texture: The relative proportions of sand, silt, and clay which determines its moisture retention
  • Soil Structure: Arrangement of soil particles into aggregates.
  • Soil Consistency: Measures a soil's resistance to breaking, determining its moisture level.
  • Hydric Soils: Soils which are permanently or seasonally saturated by water
  • Soil Erosion: the loss of topsoil due to various human activities
  • Desertification: Land degradation in drylands due to numerous factors like overgrazing, excessive crop planting, deforestation.
  • Oxisols: Subtropical or tropical soils with high iron and aluminum content (low fertility).
  • Aridsols: Desert soils with low moisture and organic matter; prone to salinization.

Climate and Weather

  • Environmental Lapse Rate: Rate at which air temperature falls with increasing height in the troposphere.
  • Dry Adiabatic Rate: Rate of cooling or heating of unsaturated air. Moist Adiabatic Rate: Rate that saturated air cools or heats.
  • Lifting Condensation Level: Altitude at which rising air becomes saturated and condensation starts.
  • Stable Atmospheric Conditions: Environmental lapse rate lower than both the dry and moist adiabatic rate.
  • Fog: A cloud that forms near or on the ground
  • Radiation Fog: Ground cools air below the dew-point temperature on calm clear nights.
  • Advection Fog: Unsaturated air passes over a cooler surface, and it becomes saturated
  • Evaporation Fog: When air in contact with a warm surface becomes saturated
  • Continental Polar air masses: cold and dry.
  • Convergent Lifting: Air flows and is forced upwards, caused by low pressure.
  • Convectional Lifting: When air heats and rises.
  • Orographic Lifting: Air forced up a mountain.
  • Rain Shadow Effect: Dry conditions on the leeward side of a mountain range, due to orographic precipitation processes.
  • Frontal Lifting: Air is pushed upward along fronts with different temperatures.
  • Fronts: Boundary between different air masses, usually associated with precipitation.
  • Midlatitude Cyclones: Result of cold and warm air meeting.
  • Squall Lines: Narrow bands of high winds and storms formed by the collision of two different air masses.
  • Derecho: Straight-line wind from severe thunderstorms.
  • Wind Shear: Difference in wind speed or direction.
  • Outgassing: Water vapor emerging from within or below Earth's crust
  • Eustasy: Changes in sea level caused by variations in ocean water volume
  • Glaco-eustasy: Changes in sea level due to variations in ice sheet volume.
  • Hydrologic Cycle: Continuous flow of water around the world in different states (solid, liquid, gas): evaporation, precipitation, transpiration.
  • Transpiration: Water movement from plants to the atmosphere.
  • Overland Flow: Water flow over the land's surface.
  • Infiltration: Process by which water soaks into the surface through soil
  • Interception: Precipitation on vegetation rather than ground.
  • Streamflow: Water flowing into streams and rivers
  • Percolation: Infiltration into the ground.
  • Pedon: Smallest unit of soil.

Earth's Internal Processes

  • Geomorphology: The study of the surface features of Earth, their origins, and developments over time.
  • Superposition: The principle that in undisturbed rock layers, younger rocks lie above older rocks (layers).
  • Uniformitarianism: The principle that geologic processes that occur now are the same as those that have occurred in the geological past.
  • Radiometric Dating: Dating method using decay of radioactive isotopes.
  • Earth's Age: Estimated to be 4.6 billion years old.
  • Moho: Boundary between Earth's crust and mantle.
  • Continental Crust: The layer of the crust beneath land.
  • Oceanic Crust: The layer of crust beneath the ocean.
  • Lithosphere: Earth's rigid outer layer (includes the crust and upper mantle).
  • Asthenosphere: Layer beneath the lithosphere, which deforms and flows under stress, allowing the movement of Earth's plates.
  • Mineral: An inorganic substance of natural occurrence, having a specific formula, crystalline structure, and defining characteristics.
  • Clasts: Small pieces or fragments of a rock.

Rocks & Processes

  • Lithification: Process that converts sediments into solid rock by compaction or cementation.
  • Continental Drift: Gradual movement of continents across the Earth's surface over geological time.
  • Seafloor Spreading: Process where new oceanic crust forms along a mid-ocean ridge and older crust moves away from the ridge.
  • Subduction: One plate going under another plate, often associated with deep ocean trenches and volcanism.
  • Convergent Boundary: Where two plates move toward each other (often associated with mountains, volcanism).
  • Divergent Boundary: Where two plates move away from each other (often associated with mid-ocean ridges),
  • Transform Boundary: Where two plates slide past each other (associated with faults and earthquakes).
  • Fault: A break in the Earth's crust where rocks have moved past each other.
  • Fluvial Processes: Processes involving the work of flowing water on Earth's surface.
  • Erosion: Removal and transport of materials by natural forces such as water, wind, or ice
  • Deposition: Process of settling or dropping sediment into a new location
  • Watershed (Drainage Basin): The land area from which water drains into a particular river, lake, wetland, or other body of water.
  • Sheetflow: Surface water flow not concentrated in channels.
  • Rill: Small channels where water flows
  • Continental Divide: Ridge that separates different drainage basins

Other

  • Homosphere: Lower layer of Earth's atmosphere (0-80 km), containing evenly mixed gases.
  • Anticyclones: Rotation of air outward from a high-pressure point (clockwise in North, counter clockwise in South).
  • Horse Latitudes: Belts of calm air and sea occurring in both hemispheres between the trade winds and the westerlies.

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