AP Environmental Science Flashcards: Earths Atmosphere

What this deck covers

This deck focuses on Earths Atmosphere, giving you a quick way to review the definitions, rules, and examples that matter most for AP Environmental Science.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Flashcard 1: Which layer of the atmosphere is closest to Earth's surface?

Answer: Troposphere. Extends from Earth's surface to about 12 km altitude.

Flashcard 2: Identify the global wind pattern located at the equator.

Answer: Trade winds. Blow from east to west near the equator.

Flashcard 3: What is the name of the high-altitude, fast-moving air currents?

Answer: Jet streams. Found in the upper troposphere and lower stratosphere.

Flashcard 4: What is the significance of the ionosphere?

Answer: It reflects radio waves back to Earth. Enables long-distance radio communication around Earth.

Flashcard 5: Identify the global wind pattern located at the equator.

Answer: Trade winds. Blow from east to west near the equator.

Flashcard 6: What is the primary gas in Earth's atmosphere by volume?

Answer: Nitrogen. Makes up about 78% of the atmosphere by volume.

Flashcard 7: Identify the layer of the atmosphere where weather occurs.

Answer: Troposphere. Contains most atmospheric water vapor and air movement.

Flashcard 8: What is the primary human activity that increases atmospheric carbon dioxide?

Answer: Burning fossil fuels. Releases stored carbon from coal, oil, and natural gas.

Flashcard 9: What term describes the long-term average of weather patterns in an area?

Answer: Climate. Average weather conditions over 30+ years.

Flashcard 10: What is the main factor that influences local atmospheric pressure?

Answer: Altitude. Higher altitude means less atmospheric mass above.

Flashcard 11: Identify the process of water vapor turning into liquid in the atmosphere.

Answer: Condensation. Water vapor cools and changes back to liquid droplets.

Flashcard 12: What is the process by which water vapor enters the atmosphere?

Answer: Evaporation. Solar energy converts liquid water to water vapor.

Flashcard 13: What atmospheric layer is least dense?

Answer: Exosphere. Outermost layer where atmosphere gradually merges with space.

Flashcard 14: What is the boundary between the Troposphere and the Stratosphere called?

Answer: Tropopause. Marks where temperature stops decreasing with altitude.

Flashcard 15: What is the main factor that influences local atmospheric pressure?

Answer: Altitude. Higher altitude means less atmospheric mass above.

Flashcard 16: Which atmospheric layer protects Earth from meteoroids?

Answer: Mesosphere. Meteors burn up due to friction in this layer.

Flashcard 17: What is the primary method of heat transfer from the sun to Earth?

Answer: Radiation. Electromagnetic energy travels through space without matter.

Flashcard 18: What is the approximate percentage of oxygen in Earth's atmosphere?

Answer: 21%. Second most abundant gas in Earth's atmosphere.

Flashcard 19: Which layer of the atmosphere is closest to Earth's surface?

Answer: Troposphere. Extends from Earth's surface to about 12 km altitude.

Flashcard 20: Identify the greenhouse gas produced by agricultural activities.

Answer: Methane. Released from livestock, rice fields, and landfills.

Flashcard 21: What term describes the warming of Earth's surface due to trapped heat?

Answer: Greenhouse effect. Atmospheric gases trap outgoing infrared radiation from Earth.

Flashcard 22: Identify the primary source of energy that drives Earth's atmospheric processes.

Answer: The Sun. Solar radiation powers weather, climate, and atmospheric circulation.

Flashcard 23: What is the approximate percentage of oxygen in Earth's atmosphere?

Answer: 21%. Second most abundant gas in Earth's atmosphere.

Flashcard 24: How does atmospheric pressure change with altitude?

Answer: Decreases with altitude. Less air mass above creates lower pressure.

Flashcard 25: Which process describes the release of water from plants into the atmosphere?

Answer: Transpiration. Water vapor exits through leaf pores called stomata.

Flashcard 26: What is the average temperature decrease per kilometer in the Troposphere?

Answer: $6.5^\circ \text{C/km}$. Known as the environmental lapse rate.

Flashcard 27: In which layer of the atmosphere is the ozone layer found?

Answer: Stratosphere. Contains the highest concentration of ozone molecules.

Flashcard 28: What term describes the cycling of carbon through the atmosphere, oceans, and organisms?

Answer: Carbon cycle. Carbon moves between atmosphere, land, and ocean reservoirs.

Flashcard 29: Identify the greenhouse gas produced by agricultural activities.

Answer: Methane. Released from livestock, rice fields, and landfills.

Flashcard 30: What is the term for the movement of air from high to low pressure?

Answer: Wind. Air flows from areas of higher to lower pressure.

Flashcard 31: Which process describes the release of water from plants into the atmosphere?

Answer: Transpiration. Water vapor exits through leaf pores called stomata.

Flashcard 32: Which atmospheric layer protects Earth from meteoroids?

Answer: Mesosphere. Meteors burn up due to friction in this layer.

Flashcard 33: In which layer of the atmosphere is the ozone layer found?

Answer: Stratosphere. Contains the highest concentration of ozone molecules.

Flashcard 34: What is the primary human activity that increases atmospheric carbon dioxide?

Answer: Burning fossil fuels. Releases stored carbon from coal, oil, and natural gas.

Flashcard 35: What is the name of the high-altitude, fast-moving air currents?

Answer: Jet streams. Found in the upper troposphere and lower stratosphere.

Flashcard 36: What is the term for the apparent deflection of moving air due to Earth's rotation?

Answer: Coriolis effect. Earth's rotation deflects moving air masses.

Flashcard 37: What is the process by which water vapor enters the atmosphere?

Answer: Evaporation. Solar energy converts liquid water to water vapor.

Flashcard 38: What is the term for the effect of Earth's atmosphere trapping heat?

Answer: Greenhouse effect. Atmospheric gases prevent heat from escaping to space.

Flashcard 39: What is the term for the apparent deflection of moving air due to Earth's rotation?

Answer: Coriolis effect. Earth's rotation deflects moving air masses.

Flashcard 40: What is the significance of the ionosphere?

Answer: It reflects radio waves back to Earth. Enables long-distance radio communication around Earth.

Flashcard 41: Identify the process where plants absorb carbon dioxide during photosynthesis.

Answer: Carbon fixation. Plants convert atmospheric $CO_2$ into organic compounds.

Flashcard 42: What term describes the long-term average of weather patterns in an area?

Answer: Climate. Average weather conditions over 30+ years.

Flashcard 43: Which atmospheric layer contains the ionosphere?

Answer: Thermosphere. High-energy solar radiation ionizes gas molecules here.

Flashcard 44: What is the main consequence of thinning of the ozone layer?

Answer: Increased UV radiation reaching Earth. More harmful radiation reaches Earth's surface.

Flashcard 45: Identify the process where plants absorb carbon dioxide during photosynthesis.

Answer: Carbon fixation. Plants convert atmospheric $CO_2$ into organic compounds.

Flashcard 46: How does atmospheric pressure change with altitude?

Answer: Decreases with altitude. Less air mass above creates lower pressure.

Flashcard 47: What is the primary gas in Earth's atmosphere by volume?

Answer: Nitrogen. Makes up about 78% of the atmosphere by volume.

Flashcard 48: What is the primary method of heat transfer from the sun to Earth?

Answer: Radiation. Electromagnetic energy travels through space without matter.

Flashcard 49: What term describes the warming of Earth's surface due to trapped heat?

Answer: Greenhouse effect. Atmospheric gases trap outgoing infrared radiation from Earth.

Flashcard 50: What is the main function of the ozone layer?

Answer: To absorb ultraviolet (UV) radiation. Protects life by filtering harmful solar radiation.

Flashcard 51: What is the main consequence of thinning of the ozone layer?

Answer: Increased UV radiation reaching Earth. More harmful radiation reaches Earth's surface.

Flashcard 52: What is the unit of measurement for atmospheric pressure?

Answer: Pascal (Pa) or Millibar (mb). Standard units for measuring atmospheric force per area.

Flashcard 53: What gas in the atmosphere is primarily responsible for the greenhouse effect?

Answer: Carbon dioxide. Traps heat in the atmosphere, causing global warming.

Flashcard 54: What term describes the cycling of carbon through the atmosphere, oceans, and organisms?

Answer: Carbon cycle. Carbon moves between atmosphere, land, and ocean reservoirs.

Flashcard 55: What is the term for the movement of air from high to low pressure?

Answer: Wind. Air flows from areas of higher to lower pressure.

Flashcard 56: What is the average temperature decrease per kilometer in the Troposphere?

Answer: $6.5^\text{o} \text{C/km}$. Known as the environmental lapse rate.

Flashcard 57: What is the boundary between the Troposphere and the Stratosphere called?

Answer: Tropopause. Marks where temperature stops decreasing with altitude.

Flashcard 58: What is the term for the transfer of heat through the atmosphere by mass movement?

Answer: Convection. Warm air rises and cool air sinks, creating circulation.

Flashcard 59: What is the term for the transfer of heat through the atmosphere by mass movement?

Answer: Convection. Warm air rises and cool air sinks, creating circulation.

Flashcard 60: Identify the process of water vapor turning into liquid in the atmosphere.

Answer: Condensation. Water vapor cools and changes back to liquid droplets.

Flashcard 61: What gas in the atmosphere is primarily responsible for the greenhouse effect?

Answer: Carbon dioxide. Traps heat in the atmosphere, causing global warming.

Flashcard 62: What is the primary component of smog?

Answer: Ground-level ozone. Forms when sunlight reacts with pollutants near Earth's surface.

Flashcard 63: Identify the primary source of energy that drives Earth's atmospheric processes.

Answer: The Sun. Solar radiation powers weather, climate, and atmospheric circulation.

Flashcard 64: Identify the layer of the atmosphere where weather occurs.

Answer: Troposphere. Contains most atmospheric water vapor and air movement.

Flashcard 65: What is the unit of measurement for atmospheric pressure?

Answer: Pascal (Pa) or Millibar (mb). Standard units for measuring atmospheric force per area.

Flashcard 66: What atmospheric layer is least dense?

Answer: Exosphere. Outermost layer where atmosphere gradually merges with space.

Flashcard 67: What is the main function of the ozone layer?

Answer: To absorb ultraviolet (UV) radiation. Protects life by filtering harmful solar radiation.

Flashcard 68: What is the term for the effect of Earth's atmosphere trapping heat?

Answer: Greenhouse effect. Atmospheric gases prevent heat from escaping to space.

Flashcard 69: Which atmospheric layer contains the ionosphere?

Answer: Thermosphere. High-energy solar radiation ionizes gas molecules here.

Flashcard 70: What is the primary component of smog?

Answer: Ground-level ozone. Forms when sunlight reacts with pollutants near Earth's surface.