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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. 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
2. 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
3. Which outermost fringe of the atmosphere gradually merges into outer space: the exosphere or the troposphere?
Which outermost fringe of … · 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 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
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. What harmful solar radiation does the stratospheric ozone layer (O₃) absorb to protect living organisms on Earth: ultraviolet (UV) radiation or radio waves?
What harmful solar radiati… · Earth’s atmosphere & climate
8. Which gas makes up the largest proportion (about 78%) of Earth’s dry atmosphere: nitrogen or carbon dioxide?
78% · Earth’s atmosphere & climate
9. In the troposphere, what generally happens to air temperature as altitude increases: temperature decreases, or temperature boils?
In the troposphere, what g… · Earth’s atmosphere & climate
10. What steady tropical winds blow toward the Equator from the northeast in the Northern Hemisphere and southeast in the Southern Hemisphere: the trade winds or the polar vortex?
What steady tropical winds… · Earth’s atmosphere & climate
11. Which gas makes up about 21% of Earth’s atmosphere and is essential for aerobic respiration: oxygen or helium?
21% · Earth’s atmosphere & climate
12. 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

12 questions · Seed 46 · 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. 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.
2. 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.
3. 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.
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 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.
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. What harmful solar radiation does the stratospheric ozone layer (O₃) absorb to protect living organisms on Earth: ultraviolet (UV) radiation or radio waves?
Ultraviolet (UV) radiation
Stratospheric ozone absorbs most high-energy UV-B and UV-C radiation from the Sun.
8. Which gas makes up the largest proportion (about 78%) of Earth’s dry atmosphere: nitrogen or carbon dioxide?
Nitrogen
Dry air is approximately 78% nitrogen (N₂), 21% oxygen (O₂) and 1% other gases.
9. In the troposphere, what generally happens to air temperature as altitude increases: temperature decreases, or temperature boils?
Temperature decreases
The troposphere is warmed mainly from the ground up, so temperature drops by about 6.5 °C per kilometre of altitude.
10. What steady tropical winds blow toward the Equator from the northeast in the Northern Hemisphere and southeast in the Southern Hemisphere: the trade winds or the polar vortex?
Trade winds
The trade winds are prevailing tropical easterlies in the lower portion of the Hadley cell.
11. 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.
12. 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.

12 questions · Seed 46 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 10-12

Earth’s atmosphere & climate

Take your time. Show your thinking.

1. 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
2. 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
3. Which outermost fringe of the atmosphere gradually merges into outer space: the exosphere or the troposphere?
Which outermost fringe of … · 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 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
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. What harmful solar radiation does the stratospheric ozone layer (O₃) absorb to protect living organisms on Earth: ultraviolet (UV) radiation or radio waves?
What harmful solar radiati… · Earth’s atmosphere & climate
8. Which gas makes up the largest proportion (about 78%) of Earth’s dry atmosphere: nitrogen or carbon dioxide?
78% · Earth’s atmosphere & climate
9. In the troposphere, what generally happens to air temperature as altitude increases: temperature decreases, or temperature boils?
In the troposphere, what g… · Earth’s atmosphere & climate
10. What steady tropical winds blow toward the Equator from the northeast in the Northern Hemisphere and southeast in the Southern Hemisphere: the trade winds or the polar vortex?
What steady tropical winds… · Earth’s atmosphere & climate
11. Which gas makes up about 21% of Earth’s atmosphere and is essential for aerobic respiration: oxygen or helium?
21% · Earth’s atmosphere & climate
12. 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

12 questions · Seed 46 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 10-12

Earth’s atmosphere & climate

Answers and reasoning. Review before teaching.

1. 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.
2. 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.
3. 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.
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 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.
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. What harmful solar radiation does the stratospheric ozone layer (O₃) absorb to protect living organisms on Earth: ultraviolet (UV) radiation or radio waves?
Ultraviolet (UV) radiation
Stratospheric ozone absorbs most high-energy UV-B and UV-C radiation from the Sun.
8. Which gas makes up the largest proportion (about 78%) of Earth’s dry atmosphere: nitrogen or carbon dioxide?
Nitrogen
Dry air is approximately 78% nitrogen (N₂), 21% oxygen (O₂) and 1% other gases.
9. In the troposphere, what generally happens to air temperature as altitude increases: temperature decreases, or temperature boils?
Temperature decreases
The troposphere is warmed mainly from the ground up, so temperature drops by about 6.5 °C per kilometre of altitude.
10. What steady tropical winds blow toward the Equator from the northeast in the Northern Hemisphere and southeast in the Southern Hemisphere: the trade winds or the polar vortex?
Trade winds
The trade winds are prevailing tropical easterlies in the lower portion of the Hadley cell.
11. 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.
12. 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.

12 questions · Seed 46 · Age guidance, not curriculum certification