The biosphere is the nonliving part of Earth.

• True

• False

Which best describes the relationship between Earth's four spheres?

• system

• isolated

• separate

• unchanging

Which is an example of a human impact on the geosphere?

• burning fossil fuels

• mining for mineral ores

• building a dam for hydroelectric energy

• hunting an animal to extinction

Which is an example of a human impact on the biosphere?

• burning fossil fuels

• mining for mineral ores

• building a dam for hydroelectric energy

• hunting an animal to extinction

Increase in human population impacts which of Earth's spheres?

• biosphere only

• biosphere and hydrosphere only

• biosphere, hydrosphere, and atmosphere only

• biosphere, hydrosphere, atmosphere, and geosphere

The hydrosphere relates to water.

• true

• false

What of Earth's spheres is composed of a mixture of gases?

• geosphere

• hydrosphere

• atmosphere

• geosphere

Earth's outermost sphere is called the

• biosphere

• atmosphere

• lithosphere

• hydrosphere

Earth's hydrosphere is best described as

• the relatively thin layer of rock found above Earth's mantle.

• the hot liquid rock located in Earth's outer core.

• the very dense rock located in Earth's inner core.

• all of Earth's water.

Which of Earth's four spheres is involved when a volcano erupts? You may select more than one answer if needed.

• biosphere

• geosphere

• atmosphere

• hydrosphere