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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 13-15

Earth’s atmosphere & climate

Take your time. Show your thinking.

1. 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
2. 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
3. What causes the enhanced greenhouse effect (anthropogenic global warming): rising concentrations of greenhouse gases from human activities, or changes in Earth’s gravity?
What causes the enhanced g… · Earth’s atmosphere & climate
4. Why is carbon monoxide (CO) from incomplete fuel combustion dangerous in enclosed spaces: it binds to haemoglobin and reduces oxygen transport in blood, or it freezes rooms?
Why is carbon monoxide (CO… · Earth’s atmosphere & climate
5. Which outermost fringe of the atmosphere gradually merges into outer space: the exosphere or the troposphere?
Which outermost fringe of … · Earth’s atmosphere & climate
6. 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
7. 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
8. 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
9. 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
10. 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
11. 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
12. 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

12 questions · Seed 104742 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 13-15

Earth’s atmosphere & climate

Answers and reasoning. Review before teaching.

1. 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.
2. 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.
3. What causes the enhanced greenhouse effect (anthropogenic global warming): rising concentrations of greenhouse gases from human activities, or changes in Earth’s gravity?
Rising concentrations of greenhouse gases from human activities
Burning fossil fuels and deforestation increase atmospheric CO₂ and methane, trapping extra heat.
4. Why is carbon monoxide (CO) from incomplete fuel combustion dangerous in enclosed spaces: it binds to haemoglobin and reduces oxygen transport in blood, or it freezes rooms?
It binds to haemoglobin and reduces oxygen transport in blood
Carbon monoxide is a colourless, odourless toxic gas that blocks oxygen delivery.
5. 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.
6. 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.
7. 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).
8. 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.
9. 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.
10. 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.
11. 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.
12. 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.

12 questions · Seed 104742 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Earth’s atmosphere & climate

Take your time. Show your thinking.

1. 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
2. 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
3. What causes the enhanced greenhouse effect (anthropogenic global warming): rising concentrations of greenhouse gases from human activities, or changes in Earth’s gravity?
What causes the enhanced g… · Earth’s atmosphere & climate
4. Why is carbon monoxide (CO) from incomplete fuel combustion dangerous in enclosed spaces: it binds to haemoglobin and reduces oxygen transport in blood, or it freezes rooms?
Why is carbon monoxide (CO… · Earth’s atmosphere & climate
5. Which outermost fringe of the atmosphere gradually merges into outer space: the exosphere or the troposphere?
Which outermost fringe of … · Earth’s atmosphere & climate
6. 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
7. 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
8. 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
9. 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
10. 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
11. 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
12. 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

12 questions · Seed 104742 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Earth’s atmosphere & climate

Answers and reasoning. Review before teaching.

1. 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.
2. 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.
3. What causes the enhanced greenhouse effect (anthropogenic global warming): rising concentrations of greenhouse gases from human activities, or changes in Earth’s gravity?
Rising concentrations of greenhouse gases from human activities
Burning fossil fuels and deforestation increase atmospheric CO₂ and methane, trapping extra heat.
4. Why is carbon monoxide (CO) from incomplete fuel combustion dangerous in enclosed spaces: it binds to haemoglobin and reduces oxygen transport in blood, or it freezes rooms?
It binds to haemoglobin and reduces oxygen transport in blood
Carbon monoxide is a colourless, odourless toxic gas that blocks oxygen delivery.
5. 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.
6. 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.
7. 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).
8. 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.
9. 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.
10. 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.
11. 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.
12. 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.

12 questions · Seed 104742 · Age guidance, not curriculum certification