Carbon Dioxide

This 11-question quiz looks at carbon dioxide, the gas we breathe out and plants take in.

You will answer fill-in-the-blank and true or false items, with prompts such as What is the solid form of carbon dioxide? and Carbon dioxide is absorbed by trees and plants during ___.

One of the more surprising facts is that the solid form, known as dry ice, skips the liquid stage entirely and turns straight into a gas, a change called sublimation.

You will also touch on where the gas comes from and why it can be dangerous in large amounts.

Recommended level: intermediate.

0 of 11 answered Score: 0%

Question 1

Carbon dioxide is made up of ___ oxygen atoms bonded with a single carbon atom.

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Carbon dioxide is lighter than air.

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Carbon dioxide can be toxic at high concentration.

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Humans and animals breathe out ___.

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___ is the process that changes solid carbon dioxide into gas.

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Which does not emit carbon dioxide?

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Carbon dioxide is absorbed by trees and plants during ___.

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What is the solid form of carbon dioxide?

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At a higher concentration, carbon dioxide has a ___.

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Carbon dioxide has no color.

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Carbon dioxide is a by-product of the ___ of fossil fuels and wood.

correct answers

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