Yr 9 Climate Revision

Which gas was thought to be a major part of the early atmosphere?

• Carbon dioxide
• Nitrogen
• Oxygen

Which of these planets has an atmosphere most similar to what scientists thought the Earth's early atmosphere was like?

• Mercury
• Venus
• Saturn

In the modern day atmosphere, what is the approximate percentage of nitrogen?

• 0.04%
• 20%
• 80%

The early atmosphere contained a lot more water vapour than the modern atmosphere does. Where did it go?

• It escaped into space.
• It condensed into oceans.
• It was absorbed by plants.

What biochemical process absorbs carbon dioxide from the atmosphere and replaces it with oxygen?

• Respiration
• Digestion
• Photosynthesis

Which of the following is the correct word equation for photosynthesis?

• glucose → carbon dioxide + ethanol
• glucose + oxygen → carbon dioxide + water
• carbon dioxide + water → glucose + oxygen

Which process removed carbon dioxide from the atmosphere?

• Formation of igneous rocks
• Formation of sedimentary rocks
• Formation of metamorphic rocks

Which of the following is not a fossil fuel?

• Crude oil
• Coal
• Hydrogen

How long does it take to form fossil fuels?

• Millions of years
• Thousands of years
• Hundreds of years

Why did nitrogen build up in the atmosphere?

• It is unreactive
• It is produced by respiration
• It is produced by farming