Both oil and gas are formed from small plant and animal organisms. What conditions are needed to make gas (not oil)?

What was coal formed from?

Which energy source is the most dominant?

Which of these can fossil fuels NOT make?

Fossil fuels took 300 _______ years to form.

What do fossil fuels create when they burn?

As fossil fuels become more scarce, they also become more _______.

Which of these are NOT a fossil fuel?

Which of these has the lowest energy density?

What does too much carbon dioxide cause?

The dinosaurs were alive _______ the Carboniferous Period.

Fossil fuels power _______.

Geopolitical issues that arise from fossil fuels might include _______.

There were a lot of _______ during the Carboniferous period.

Fossil fuels are formed from _______ plants and animals.

Fossil fuels are considered _______.

We began using lots of fossil fuels during the _______.

Scientists predict that almost all the fossil fuels will be used within ______ years.

The consequences of extracting more challenging energy do NOT include _______.