Solar System, Sun, Stars, Unit Review

The layer of the sun you see when you look at the sky is the photosphere. (never look directly at the sun)

Rotation is the movement of an object as it spins (like a ball spinning on someone's finger).

The only planet that has the right conditions to support life is

Mercury, Venus, Earth, and Mars are all outer planets.

Gravity is the force that keeps the planets in orbit around the sun.

During which season does Earth have the least amount of daylight hours?

How long does it take the Earth to complete one revolution around the sun?

Which of the following is not one of the layers of the sun?

The imaginary line that runs through Earth's North and South Poles is its

Day and night is caused by Earth's

How long does it take Earth to complete one rotation?

The moon has

Rotation is when Earth orbits the sun.

How many planets are in our solar system?

A ____________ is the path the Earth (or another planet) takes around the sun.

Which is the correct order of the planets from nearest the sun to farthest from the sun?

Our solar system is in the

An area in space whose gravity is so strong that even light cannot get out of it is a

Why does the sun appear to be large?

Copernicus and Galileo both believed the ______ was the center of the universe (heliocentric theory).

The moon's phases are caused by its revolution around Earth.

The Sun is a

The outer planets are