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UNIT 5: Earth and Space, Part 2
Lesson 1: Earth’s Changing Surface
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UNIT 5: Earth and Space, Part 2
Lesson 3: Alternative Energy Resources
Biofuels
The prefix bio- means life. Biofuels are fuels made from plants.
Think about—
Gasoline is a fuel that is burned in a car engine to make the car
run.
Have you ever seen the word ethanol on a gasoline pump?
Gasoline may contain ethanol. Ethanol is a biofuel made from
corn.
Ethanol is an alternative energy resource.
Another example of a biofuel is biodiesel. Biodiesel is a fuel
that can be made from vegetable oils or fats. Biodiesel is an
alternative energy resource.

Let’s Elaborate!
Create a poster to persuade people to—
conserve fossil fuels
begin using alternative energy resources
Be prepared to present your poster to the class.

Let’s Evaluate!
Use your knowledge of alternative energy resources to complete
the assessment.