Vocabulary
conserve To keep things safe and ensure that they will always be around.
export To send out to another country.
import To receive from another country.
macronutrients Nutrients that are needed by an organism in a large amount.
non-renewable A resource that cannot be regenerated; once it is used up, it cannot be
replaced within a human lifetime.
timber Trees that are cut for wood to be used for building or some other purpose.
nutrients Substances that a living thing needs to grow.
renewable A resource that can be regenerated, new ones can be made or grown to replace
ones that get used.
Points to Consider
- Could a renewable resource ever become nonrenewable?
- How many resources do you use every day?
- Which is more sustainable: using renewable resources or nonrenewable resources?
Why?
20.2 Energy Conservation
Lesson Objectives
- Discuss why it takes energy to get energy and why some forms of energy are more
useful than others. - Describe some ways to conserve energy or to use energy more efficiently.