Which statement best defines conservation as used in this chapter?

• Using resources quickly before they run out

• Using something carefully so it will not be wasted

• Collecting as many resources as possible

• Replacing all natural resources with artificial ones

Which of the following is an example of a natural resource mentioned in the chapter introduction?

• Plastic

• Water

• Concrete

• Steel

Why do people practice conservation according to the text?

• To make resources more expensive

• So natural resources will not be wasted and run out

• To encourage using more fossil fuels

• To stop plants from growing too fast

Who are conservationists, as described in the section?

• People who make new resources in factories

• People who work to conserve natural resources, many of whom are scientists

• People who study stars and planets only

• People who build roads and bridges

What is one goal conservationists have for Earth?

• To use as many resources as possible each day

• To keep Earth clean and beautiful and safe for humans, plants, and animals

• To remove plants from cities

• To focus only on protecting fossil fuels

Which statement best explains why conservationists want to conserve water?

• Water is a natural resource needed for life.

• Water is unlimited and cannot be wasted.

• Water is only used for recreation.

• Water is not part of Earth’s resources.

According to the material, what could happen if people use too much of Earth’s water?

• It would cause many problems.

• It would make Earth’s water cleaner.

• It would increase rainfall.

• It would have no effect.

Which daily habit is recommended to help conserve water when brushing your teeth?

• Let the water run the whole time.

• Turn the water off after you start brushing.

• Brush for a shorter time without toothpaste.

• Rinse with hot water only.

Which action most directly reduces water use during showers?

• Taking shorter showers.

• Using more soap.

• Showering with the door closed.

• Turning on both hot and cold water.

A four-minute shower uses 20–40 gallons of water. Which reasoning best supports why shorter showers conserve water?

• Shorter showers reduce the time water flows, so fewer gallons are used.

• Shorter showers increase the water pressure, so more gallons are used.

• Shorter showers change water into steam, so gallons do not matter.

• Shorter showers use colder water, so gallons are the same.