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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 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
3. Which noble gas is the third most abundant gas in dry air (about 0.93%): argon or neon?
0.93% · Earth’s atmosphere & climate
4. 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
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. Why are low-lying coral atoll nations particularly vulnerable to global warming: thermal expansion of seawater and melting ice sheets raise sea levels, or mountains grow taller?
Why are low-lying coral at… · Earth’s atmosphere & climate
7. 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
8. 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
9. 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
10. 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
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 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

12 questions · Seed 104732 · 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 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.
3. 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.
4. 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.
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. Why are low-lying coral atoll nations particularly vulnerable to global warming: thermal expansion of seawater and melting ice sheets raise sea levels, or mountains grow taller?
Thermal expansion of seawater and melting ice sheets raise sea levels
Warming oceans expand and land ice melts, raising global mean sea level.
7. 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.
8. 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.
9. 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.
10. 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.
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 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.

12 questions · Seed 104732 · 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 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
3. Which noble gas is the third most abundant gas in dry air (about 0.93%): argon or neon?
0.93% · Earth’s atmosphere & climate
4. 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
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. Why are low-lying coral atoll nations particularly vulnerable to global warming: thermal expansion of seawater and melting ice sheets raise sea levels, or mountains grow taller?
Why are low-lying coral at… · Earth’s atmosphere & climate
7. 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
8. 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
9. 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
10. 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
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 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

12 questions · Seed 104732 · 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 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.
3. 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.
4. 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.
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. Why are low-lying coral atoll nations particularly vulnerable to global warming: thermal expansion of seawater and melting ice sheets raise sea levels, or mountains grow taller?
Thermal expansion of seawater and melting ice sheets raise sea levels
Warming oceans expand and land ice melts, raising global mean sea level.
7. 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.
8. 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.
9. 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.
10. 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.
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 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.

12 questions · Seed 104732 · Age guidance, not curriculum certification