Earth is part of a larger system that contains other plants, moons, and stars.

• True

• False

Planets, moons, and stars revolve around the sun, but asteroids and meteoroids do not.

• True

• False

The biosphere cannot exist without interaction with the atmosphere and hydrosphere

• True

• False

The lithosphere is part of Earth where life exists.

• True

• False

The Earth's surface is made up of 70% water and 30% land.

• True

• False

The ___________ includes all liquid and frozen surface water, ground water, and water vapor.

• lithosphere

• biosphere

• hydrosphere

• atmosphere

What keeps the planets revolving around the sun?

• the sun's heat

• the sun's gravitational pull

• the sun's inertia

• the sun's energy

Why are Mercury and Venus scalding hot?

• They are made of hot gasses.

• They are made of semi-solid magma.

• They are closest to the sun.

• They have thin atmosphere.

A Continental shelf is

• a landform that connects continents.

• a landform that separates continents.

• an underwater extension of alluvial sediment.

• an underwater extension of a coastal plain.

Life does not exist on other planets in our solar system due to their

• extreme temperatures.

• size.

• shape.

• lack of carbon dioxide