WONDER #1427: What Are Fossil Fuels?
Question 1 of 3
As prehistoric plants and animals died and decomposed on the bottoms of swamps and oceans, they formed layer after layer of a spongy material called what?
Question 2 of 3
Fossil fuels are rich in what element?
Question 3 of 3
Which of the following is NOT an example of a fossil fuel?
- natural gas
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