Fossil Fuels: Formation

What percentage of the world's energy is supplied by coal, oil, and natural gas?

• 90%

• 70%

• 100%

• 50%

Which process allows plants to convert the sun's energy into usable energy?

• Decomposition

• Combustion

• Photosynthesis

• Respiration

What happens to prehistoric organic matter over time to form fossil fuels?

• It is consumed by animals

• It dissolves in water

• It is compressed by pressure and heat

• It evaporates

From what type of organisms are oil and gas primarily formed?

• Dinosaurs

• Marine organisms

• Insects

• Land plants

Why are fossil fuels considered unsustainable?

• They are too expensive to extract

• They are renewable

• They cannot be replaced within human time scales

• They are abundant