Front

What is the force that causes dust particles to stick together in a nebula?

Back

Gravity is the force that causes dust particles to stick together in a nebula.

Front

Is the Sun smaller than any of the planets in the Solar System?

Back

False. The Sun is far larger than any of the planets in the Solar System.

Front

What two spheres are involved when water vapor condenses to form clouds in the sky?

Back

Atmosphere and Hydrosphere.

Front

What is a gigantic explosion that causes the death of a large star called?

Back

A supernova.

Front

What happens to the Sun’s interior as you move away from the center?

Back

It generally becomes cooler and less dense.

Front

What is the primary source of energy for the Earth?

Back

The Sun is the primary source of energy for the Earth.

Front

What is the process called when water changes from a gas to a liquid?

Back

Condensation.

Front

What are the four main spheres of Earth?

Back

The four main spheres are the Atmosphere, Hydrosphere, Geosphere, and Biosphere.

Front

What is the term for the layer of gases surrounding Earth?

Back

Atmosphere.

Front

What is the main component of the Earth's atmosphere?

Back

Nitrogen, which makes up about 78% of the atmosphere.