Earth Science Final Flashcards
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Earth Science Final Flashcards

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Questions and Answers

Distinguish between weather and climate?

Weather refers to the state of the atmosphere at a given time and place (short duration). Climate is the generalization of weather conditions for a given place based on the average of past records.

List the basic elements of weather and climate?

Air temperature, Humidity, Type and amounts of clouds, Type and amount of precipitation, Air pressure, Wind speed

What is the environmental lapse rate, and how is it determined?

The environmental lapse rate is the decrease in temperature as you go up through the troposphere avg = 3.5 degrees F/ 100 ft. It is determined by radio sounds attached to a balloon.

Briefly explain the cause of the seasons?

<p>Variation in the earth's angle as it revolves around the sun.</p> Signup and view all the answers

Write a general statement that relates the season, latitude, and length of daylight.

<p>The length of daylight increases with latitude toward the summer solstice and decreases with latitude towards the winter solstice.</p> Signup and view all the answers

Describe the relationship between the temperature of a radiating body and the wavelength it emits?

<p>The hotter the body, the shorter the wavelength of max radiation.</p> Signup and view all the answers

What is the likely cause of Quito, Ecuador's low average temperature?

<p>High altitude and lapse rate</p> Signup and view all the answers

Summarize the process by which water changes from one state of matter to another. Indicate whether energy is absorbed or released.

<p>Solid → Gas (sublimation, absorb), Solid → Liquid (melting, absorb), Liquid → Gas (evaporation, absorb), Gas → Solid (deposition, released), Gas → Liquid (condensation, released), Liquid → Solid (freezing, released)</p> Signup and view all the answers

Briefly describe the principle of a psychrometer?

<p>The sling psychrometer works on the principle of cooling due to evaporation.</p> Signup and view all the answers

Why does the adiabatic rate of cooling change when condensation begins?

<p>The adiabatic rate of cooling is lowered because condensation releases latent heat.</p> Signup and view all the answers

Explain the difference between the environmental lapse and adiabatic cooling?

<p>The environmental lapse rate is the cooling upward because the atmosphere is heated mainly by the earth's surface. Adiabatic cooling occurs as air rises because it expands and does work to move other air aside.</p> Signup and view all the answers

List the 5 types of fog and describe how each type forms.

<ol> <li>Advection fog - warm moist air moves over cool surface. 2. Radiation fog - earth's surface cools rapidly, thin layer of air cooled below dew point. 3. Upslope fog - air cools adiabatically as it moves up a slope. 4. Steam fog - cool air over warm water. 5. Frontal fog - warm moist air moves over cool air and rain adds moisture.</li> </ol> Signup and view all the answers

Describe sleet and freezing rain. Why does freezing rain occur on some occasions and sleet on others?

<p>Sleet is clear to translucent ice pellets. Freezing rain is rain that freezes when it hits. Both fall through a temperature inversion when snow turns to ice; sleet forms when there is a thick layer of cold air below the inversion.</p> Signup and view all the answers

Describe the operating principle of the mercury barometer and the aneroid barometer?

<p>With a mercurial barometer, the weight of the air pressure pushing down on the mercury in the dish holds up a column of mercury in a glass tube. The aneroid barometer has a metal chamber that changes shape, compressing as air pressure increases.</p> Signup and view all the answers

Write a generalization relating the spacing of isobars to wind speed?

<p>Close spaced isobars occur in areas of high wind speed while wide spaced isobars occur where there are gentle slow wind speeds.</p> Signup and view all the answers

Explain the seasonal change in winds associated with India. What term is applied to this seasonal wind shift?

<p>Land heats up and cools down faster than water, so in winter the wind blows off the cold (high air pressure) Asian continent to the Indian Ocean, producing cool, dry weather. In the summer, Asia heats up and the wind blows off the Indian Ocean, producing the warm monsoon rainy season.</p> Signup and view all the answers

What is local wind?

<p>Local winds are small scale winds produced by a locally generated pressure gradient caused by local temperature variants.</p> Signup and view all the answers

Study Notes

Weather vs. Climate

  • Weather denotes the atmospheric conditions at a specific time and place, while climate is the long-term average of weather patterns in a region.

Basic Elements of Weather and Climate

  • Key elements include air temperature, humidity, types and amounts of clouds, precipitation types and amounts, air pressure, and wind speed.

Environmental Lapse Rate

  • Represents the temperature drop of approximately 3.5°F per 100 feet in the troposphere, measured using radiosondes attached to weather balloons.

Cause of Seasons

  • Seasons result from Earth's axial tilt and its orbit around the sun, affecting solar angle and duration.

Length of Daylight and Latitude

  • Daylight length increases towards summer solstice with higher latitudes and decreases towards winter solstice.

Radiation and Temperature Relationship

  • A hotter body emits shorter wavelengths of radiation, inversely related to temperature.

Quito, Ecuador's Average Temperature

  • The low average temperature of 13°C (55°F) is due to its high altitude and effects of the environmental lapse rate.

Water State Changes

  • Changes of state:
    • Solid to gas (sublimation) - energy absorbed
    • Solid to liquid (melting) - energy absorbed
    • Liquid to gas (evaporation) - energy absorbed
    • Gas to solid (deposition) - energy released
    • Gas to liquid (condensation) - energy released
    • Liquid to solid (freezing) - energy released

Psychrometer Principle

  • A sling psychrometer operates on cooling achieved through the evaporation process.

Adiabatic Cooling and Condensation

  • The adiabatic cooling rate decreases when condensation occurs due to the release of latent heat.

Environmental Lapse vs. Adiabatic Cooling

  • The environmental lapse rate is the temperature decrease with altitude due to surface heating, while adiabatic cooling occurs from air expansion as it rises.

Types of Fog

  • Advection fog: warm moist air over cool surfaces
  • Radiation fog: rapid cooling of the earth's surface leads to condensation
  • Upslope fog: cooling as air ascends a slope
  • Steam fog: cool air meeting warm water
  • Frontal fog: moist air slumping over cooler air with added moisture from rain

Sleet vs. Freezing Rain

  • Sleet consists of ice pellets; freezing rain occurs when rain freezes upon contact. The formation of sleet vs. freezing rain depends on the thickness of the cold air layer beneath the inversion.

Barometer Principles

  • Mercury barometer: air pressure supports a mercury column; aneroid barometer: a flexible metal chamber compresses with increasing air pressure.

Isobar Spacing and Wind Speed

  • Close spacing of isobars indicates high wind speeds, while wider spacing suggests gentle winds.

Seasonal Wind Changes in India

  • Winds shift seasonally from high-pressure areas over cold land in winter (dry conditions) to winds from the Indian Ocean in summer (monsoon season).

Local Wind Definition

  • Local winds are generated by small-scale pressure differences due to temperature variations in specific areas.

Global Pressure and Rainforests

  • The rainforests of Africa's Congo basin are linked to specific global pressure belts that influence local climate patterns.

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Test your knowledge on essential concepts in Earth Science with this set of flashcards. Covering crucial topics such as the distinction between weather and climate, and the basic elements that define them, this quiz is perfect for final exam preparation.

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