Savvas Elevate Science – 6th Grade Earth Science

Pollution is: (page 609)

• helpful gases in the atmosphere

• the addition of harmful substances to the environment

• clean water from rivers

• planting trees

What is a nonrenewable resource?

• Water

• Wind

• Oil

• Sunlight

A renewable resource can be used again and again.

• True

• False

Agriculture can impact the environment through: (page 351)

• water pollution from fertilizers

• increased oxygen levels

• more forests

• fewer insects

Water pollution can harm aquatic life by:

• improving their habitats

• making water warmer

• adding harmful substances

Which of the following is a way to reduce pollution?

• Throwing trash in rivers

• Recycling materials

• Using more fossil fuels

• Cutting down more trees

Wetlands are important because they help:

• Increase drought

• Filter pollution

• Cut down forests

• Build roads

Which TWO of the following statements are true about Earth's water distribution? (Select two correct answers)

• Most of Earth's freshwater is found in rivers and lakes.

• Only a small amount of Earth's water is usable freshwater.

• Oceans contain most of Earth's water.

• All groundwater is safe to drink without treatment.