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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. 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
3. Which lowest layer of Earth’s atmosphere (from the surface to about 8–15 km) contains most clouds and weather: the troposphere or the thermosphere?
8 · 15 km · Earth’s atmosphere & climate
4. Which layer of the atmosphere lies directly above the troposphere and contains the protective ozone layer: the stratosphere or the exosphere?
Which layer of the atmosph… · Earth’s atmosphere & climate
5. 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
6. Which noble gas is the third most abundant gas in dry air (about 0.93%): argon or neon?
0.93% · Earth’s atmosphere & climate
7. In which atmospheric layer above the stratosphere (50–85 km) do most meteors burn up upon entering Earth’s atmosphere: the mesosphere or the troposphere?
50 · 85 km · Earth’s atmosphere & climate
8. Which gas makes up about 21% of Earth’s atmosphere and is essential for aerobic respiration: oxygen or helium?
21% · Earth’s atmosphere & climate
9. What happens to air pressure as you climb higher up a mountain (increasing altitude): air pressure decreases, or air pressure doubles?
What happens to air pressu… · Earth’s atmosphere & climate
10. 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
11. 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
12. Why is the natural greenhouse effect important for life on Earth: it keeps Earth’s average surface temperature warm enough for liquid water, or it blocks all sunlight?
Why is the natural greenho… · Earth’s atmosphere & climate

12 questions · Seed 48 · 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. 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.
3. Which lowest layer of Earth’s atmosphere (from the surface to about 8–15 km) contains most clouds and weather: the troposphere or the thermosphere?
Troposphere
Almost all water vapour, clouds and weather occur in the troposphere.
4. Which layer of the atmosphere lies directly above the troposphere and contains the protective ozone layer: the stratosphere or the exosphere?
Stratosphere
The stratosphere extends from the tropopause to about 50 km altitude and houses the ozone layer.
5. 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.
6. 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.
7. In which atmospheric layer above the stratosphere (50–85 km) do most meteors burn up upon entering Earth’s atmosphere: the mesosphere or the troposphere?
Mesosphere
Air friction in the mesosphere vaporises most incoming meteoroids as shooting stars.
8. 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.
9. What happens to air pressure as you climb higher up a mountain (increasing altitude): air pressure decreases, or air pressure doubles?
Air pressure decreases
At higher altitudes there is less overlying air column above you, so atmospheric pressure is lower.
10. 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.
11. 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.
12. Why is the natural greenhouse effect important for life on Earth: it keeps Earth’s average surface temperature warm enough for liquid water, or it blocks all sunlight?
It keeps Earth’s average surface temperature warm enough for liquid water
Without natural greenhouse gases, Earth’s average temperature would be below freezing (around −18 °C).

12 questions · Seed 48 · 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. 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
3. Which lowest layer of Earth’s atmosphere (from the surface to about 8–15 km) contains most clouds and weather: the troposphere or the thermosphere?
8 · 15 km · Earth’s atmosphere & climate
4. Which layer of the atmosphere lies directly above the troposphere and contains the protective ozone layer: the stratosphere or the exosphere?
Which layer of the atmosph… · Earth’s atmosphere & climate
5. 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
6. Which noble gas is the third most abundant gas in dry air (about 0.93%): argon or neon?
0.93% · Earth’s atmosphere & climate
7. In which atmospheric layer above the stratosphere (50–85 km) do most meteors burn up upon entering Earth’s atmosphere: the mesosphere or the troposphere?
50 · 85 km · Earth’s atmosphere & climate
8. Which gas makes up about 21% of Earth’s atmosphere and is essential for aerobic respiration: oxygen or helium?
21% · Earth’s atmosphere & climate
9. What happens to air pressure as you climb higher up a mountain (increasing altitude): air pressure decreases, or air pressure doubles?
What happens to air pressu… · Earth’s atmosphere & climate
10. 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
11. 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
12. Why is the natural greenhouse effect important for life on Earth: it keeps Earth’s average surface temperature warm enough for liquid water, or it blocks all sunlight?
Why is the natural greenho… · Earth’s atmosphere & climate

12 questions · Seed 48 · 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. 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.
3. Which lowest layer of Earth’s atmosphere (from the surface to about 8–15 km) contains most clouds and weather: the troposphere or the thermosphere?
Troposphere
Almost all water vapour, clouds and weather occur in the troposphere.
4. Which layer of the atmosphere lies directly above the troposphere and contains the protective ozone layer: the stratosphere or the exosphere?
Stratosphere
The stratosphere extends from the tropopause to about 50 km altitude and houses the ozone layer.
5. 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.
6. 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.
7. In which atmospheric layer above the stratosphere (50–85 km) do most meteors burn up upon entering Earth’s atmosphere: the mesosphere or the troposphere?
Mesosphere
Air friction in the mesosphere vaporises most incoming meteoroids as shooting stars.
8. 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.
9. What happens to air pressure as you climb higher up a mountain (increasing altitude): air pressure decreases, or air pressure doubles?
Air pressure decreases
At higher altitudes there is less overlying air column above you, so atmospheric pressure is lower.
10. 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.
11. 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.
12. Why is the natural greenhouse effect important for life on Earth: it keeps Earth’s average surface temperature warm enough for liquid water, or it blocks all sunlight?
It keeps Earth’s average surface temperature warm enough for liquid water
Without natural greenhouse gases, Earth’s average temperature would be below freezing (around −18 °C).

12 questions · Seed 48 · Age guidance, not curriculum certification