Fossil Fuels and Their Types

What is a fossil fuel?

• A natural substance like oil or coal

• A renewable resource

• A type of plant

• A type of animal

How long did it take for fossil fuels to form?

• Thousands of years

• Millions of years

• Hundreds of years

• Decades

The energy in fossil fuels is originally from ______.

• Water

• Sunlight

• Wind

• Earth

What process do plants use to make their own food?

• Photosynthesis

• Respiration

• Digestion

• Fermentation

What percentage of the world's energy supply was made up of fossil fuels at the start of the 21st century?

• 50%

• 70%

• 90%

• 100%

Coal is most widely used among ______ fossil fuels.

• Liquid

• Solid

• Gaseous

• None of the above

Which type of coal burns the hottest and releases fewer pollutants?

• Soft coal

• Hard coal

• Lignite

• Peat

What is the most common liquid fossil fuel?

• Natural gas

• Petroleum

• Coal

• Peat

What are two main disadvantages of fossil fuels?

• Unlimited supply and environmental benefits

• Limited supply and environmental harm

• Renewable and clean

• Cheap and abundant.

Over many years, the percentage of which gas in the atmosphere has increased due to burning fossil fuels?

• Oxygen

• Hydrogen

• Carbon dioxide

• Methane