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Earth’s atmosphere & climate

Identify the troposphere, stratosphere, mesosphere, thermosphere and exosphere and their key features. Review suitability for your learners before teaching.

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Worksheet StudioPractice pack · Ages 10-12

Earth’s atmosphere & climate

Take your time. Show your thinking.

1. Which outermost fringe of the atmosphere gradually merges into outer space: the exosphere or the troposphere?
Which outermost fringe of … · Earth’s atmosphere & climate
2. Where on Earth do glowing auroras (Aurora Borealis and Aurora Australis) occur when solar particles interact with atmospheric gases: in the thermosphere / ionosphere near the poles, or on the ocean floor?
Where on Earth do glowing … · Earth’s atmosphere & climate
3. How does planting trees (afforestation and reforestation) affect atmospheric carbon dioxide: growing trees absorb CO₂ via photosynthesis, or they release coal?
How does planting trees (a… · Earth’s atmosphere & climate
4. What do we call the day-to-day state of the atmosphere at a specific place and time, whereas the 30-year average pattern is climate: weather or geology?
30 · Earth’s atmosphere & climate
5. Which three gases are the main greenhouse gases in Earth’s atmosphere: water vapour, carbon dioxide and methane, or nitrogen, oxygen and argon?
Which three gases are the … · Earth’s atmosphere & climate
6. Which gas makes up about 21% of Earth’s atmosphere and is essential for aerobic respiration: oxygen or helium?
21% · Earth’s atmosphere & climate
7. What term describes the fraction of incoming solar radiation reflected back into space by bright surfaces like snow, ice and clouds: albedo or viscosity?
What term describes the fr… · Earth’s atmosphere & climate
8. Which noble gas is the third most abundant gas in dry air (about 0.93%): argon or neon?
0.93% · Earth’s atmosphere & climate
9. Why do commercial passenger jets often cruise in the lower stratosphere: the air is smoother with fewer convective storm clouds, or there is no gravity?
Why do commercial passenge… · Earth’s atmosphere & climate
10. What happens to ocean pH when seawater absorbs excess atmospheric carbon dioxide to form carbonic acid: ocean acidification (pH decreases), or water turns into oil?
What happens to ocean pH w… · Earth’s atmosphere & climate
11. What happens to the density of air when it is heated at constant pressure: warm air expands and becomes less dense (so it rises), or it becomes heavier than rock?
What happens to the densit… · Earth’s atmosphere & climate
12. What global deflection of moving air and ocean currents is caused by Earth’s rotation (to the right in the Northern Hemisphere and left in the Southern): the Coriolis effect or the Doppler effect?
What global deflection of … · Earth’s atmosphere & climate

12 questions · Seed 104740 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 10-12

Earth’s atmosphere & climate

Answers and reasoning. Review before teaching.

1. Which outermost fringe of the atmosphere gradually merges into outer space: the exosphere or the troposphere?
Exosphere
The exosphere is the uppermost atmospheric layer where gas molecules are extremely sparse.
2. Where on Earth do glowing auroras (Aurora Borealis and Aurora Australis) occur when solar particles interact with atmospheric gases: in the thermosphere / ionosphere near the poles, or on the ocean floor?
In the thermosphere / ionosphere near the poles
Charged solar-wind particles excite oxygen and nitrogen high in the polar thermosphere.
3. How does planting trees (afforestation and reforestation) affect atmospheric carbon dioxide: growing trees absorb CO₂ via photosynthesis, or they release coal?
Growing trees absorb CO₂ via photosynthesis
Forests act as carbon sinks by fixing atmospheric carbon into biomass.
4. What do we call the day-to-day state of the atmosphere at a specific place and time, whereas the 30-year average pattern is climate: weather or geology?
Weather
Weather describes short-term atmospheric conditions; climate describes long-term averages.
5. Which three gases are the main greenhouse gases in Earth’s atmosphere: water vapour, carbon dioxide and methane, or nitrogen, oxygen and argon?
Water vapour, carbon dioxide and methane
Triatomic and polyatomic gases like H₂O, CO₂ and CH₄ absorb and re-emit infrared radiation.
6. Which gas makes up about 21% of Earth’s atmosphere and is essential for aerobic respiration: oxygen or helium?
Oxygen
Oxygen makes up roughly 21% of the atmosphere.
7. What term describes the fraction of incoming solar radiation reflected back into space by bright surfaces like snow, ice and clouds: albedo or viscosity?
Albedo
Fresh snow and ice have high albedo (reflecting most sunlight), whereas dark ocean water has low albedo.
8. Which noble gas is the third most abundant gas in dry air (about 0.93%): argon or neon?
Argon
Argon makes up about 0.93% of dry air.
9. Why do commercial passenger jets often cruise in the lower stratosphere: the air is smoother with fewer convective storm clouds, or there is no gravity?
The air is smoother with fewer convective storm clouds
The lower stratosphere is stable and above most turbulent weather.
10. What happens to ocean pH when seawater absorbs excess atmospheric carbon dioxide to form carbonic acid: ocean acidification (pH decreases), or water turns into oil?
Ocean acidification (pH decreases)
Dissolved CO₂ forms carbonic acid, lowering ocean pH and making it harder for corals to build skeletons.
11. What happens to the density of air when it is heated at constant pressure: warm air expands and becomes less dense (so it rises), or it becomes heavier than rock?
Warm air expands and becomes less dense (so it rises)
Heating increases molecular spacing, lowering density and driving thermal convection.
12. What global deflection of moving air and ocean currents is caused by Earth’s rotation (to the right in the Northern Hemisphere and left in the Southern): the Coriolis effect or the Doppler effect?
Coriolis effect
Earth’s rotation deflects winds and currents via the Coriolis effect.

12 questions · Seed 104740 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 10-12

Earth’s atmosphere & climate

Take your time. Show your thinking.

1. Which outermost fringe of the atmosphere gradually merges into outer space: the exosphere or the troposphere?
Which outermost fringe of … · Earth’s atmosphere & climate
2. Where on Earth do glowing auroras (Aurora Borealis and Aurora Australis) occur when solar particles interact with atmospheric gases: in the thermosphere / ionosphere near the poles, or on the ocean floor?
Where on Earth do glowing … · Earth’s atmosphere & climate
3. How does planting trees (afforestation and reforestation) affect atmospheric carbon dioxide: growing trees absorb CO₂ via photosynthesis, or they release coal?
How does planting trees (a… · Earth’s atmosphere & climate
4. What do we call the day-to-day state of the atmosphere at a specific place and time, whereas the 30-year average pattern is climate: weather or geology?
30 · Earth’s atmosphere & climate
5. Which three gases are the main greenhouse gases in Earth’s atmosphere: water vapour, carbon dioxide and methane, or nitrogen, oxygen and argon?
Which three gases are the … · Earth’s atmosphere & climate
6. Which gas makes up about 21% of Earth’s atmosphere and is essential for aerobic respiration: oxygen or helium?
21% · Earth’s atmosphere & climate
7. What term describes the fraction of incoming solar radiation reflected back into space by bright surfaces like snow, ice and clouds: albedo or viscosity?
What term describes the fr… · Earth’s atmosphere & climate
8. Which noble gas is the third most abundant gas in dry air (about 0.93%): argon or neon?
0.93% · Earth’s atmosphere & climate
9. Why do commercial passenger jets often cruise in the lower stratosphere: the air is smoother with fewer convective storm clouds, or there is no gravity?
Why do commercial passenge… · Earth’s atmosphere & climate
10. What happens to ocean pH when seawater absorbs excess atmospheric carbon dioxide to form carbonic acid: ocean acidification (pH decreases), or water turns into oil?
What happens to ocean pH w… · Earth’s atmosphere & climate
11. What happens to the density of air when it is heated at constant pressure: warm air expands and becomes less dense (so it rises), or it becomes heavier than rock?
What happens to the densit… · Earth’s atmosphere & climate
12. What global deflection of moving air and ocean currents is caused by Earth’s rotation (to the right in the Northern Hemisphere and left in the Southern): the Coriolis effect or the Doppler effect?
What global deflection of … · Earth’s atmosphere & climate

12 questions · Seed 104740 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 10-12

Earth’s atmosphere & climate

Answers and reasoning. Review before teaching.

1. Which outermost fringe of the atmosphere gradually merges into outer space: the exosphere or the troposphere?
Exosphere
The exosphere is the uppermost atmospheric layer where gas molecules are extremely sparse.
2. Where on Earth do glowing auroras (Aurora Borealis and Aurora Australis) occur when solar particles interact with atmospheric gases: in the thermosphere / ionosphere near the poles, or on the ocean floor?
In the thermosphere / ionosphere near the poles
Charged solar-wind particles excite oxygen and nitrogen high in the polar thermosphere.
3. How does planting trees (afforestation and reforestation) affect atmospheric carbon dioxide: growing trees absorb CO₂ via photosynthesis, or they release coal?
Growing trees absorb CO₂ via photosynthesis
Forests act as carbon sinks by fixing atmospheric carbon into biomass.
4. What do we call the day-to-day state of the atmosphere at a specific place and time, whereas the 30-year average pattern is climate: weather or geology?
Weather
Weather describes short-term atmospheric conditions; climate describes long-term averages.
5. Which three gases are the main greenhouse gases in Earth’s atmosphere: water vapour, carbon dioxide and methane, or nitrogen, oxygen and argon?
Water vapour, carbon dioxide and methane
Triatomic and polyatomic gases like H₂O, CO₂ and CH₄ absorb and re-emit infrared radiation.
6. Which gas makes up about 21% of Earth’s atmosphere and is essential for aerobic respiration: oxygen or helium?
Oxygen
Oxygen makes up roughly 21% of the atmosphere.
7. What term describes the fraction of incoming solar radiation reflected back into space by bright surfaces like snow, ice and clouds: albedo or viscosity?
Albedo
Fresh snow and ice have high albedo (reflecting most sunlight), whereas dark ocean water has low albedo.
8. Which noble gas is the third most abundant gas in dry air (about 0.93%): argon or neon?
Argon
Argon makes up about 0.93% of dry air.
9. Why do commercial passenger jets often cruise in the lower stratosphere: the air is smoother with fewer convective storm clouds, or there is no gravity?
The air is smoother with fewer convective storm clouds
The lower stratosphere is stable and above most turbulent weather.
10. What happens to ocean pH when seawater absorbs excess atmospheric carbon dioxide to form carbonic acid: ocean acidification (pH decreases), or water turns into oil?
Ocean acidification (pH decreases)
Dissolved CO₂ forms carbonic acid, lowering ocean pH and making it harder for corals to build skeletons.
11. What happens to the density of air when it is heated at constant pressure: warm air expands and becomes less dense (so it rises), or it becomes heavier than rock?
Warm air expands and becomes less dense (so it rises)
Heating increases molecular spacing, lowering density and driving thermal convection.
12. What global deflection of moving air and ocean currents is caused by Earth’s rotation (to the right in the Northern Hemisphere and left in the Southern): the Coriolis effect or the Doppler effect?
Coriolis effect
Earth’s rotation deflects winds and currents via the Coriolis effect.

12 questions · Seed 104740 · Age guidance, not curriculum certification