Unit 1 Test Review 7.9ABC

Front

What element makes up 90% of the Sun's mass?

Back

Hydrogen

Front

Rocky planets have ____ moons than Gas planets.

Back

less

Front

Which of the following is NOT a requirement for an object to be a planet?

Back

Have its own atmosphere

Front

Where is a meteor found?

Back

In Earth's atmosphere

Front

What does aphelion mean?

Back

The farthest point a planet is from the Sun

Front

What is the main difference between rocky and gas planets?

Back

Rocky planets are solid and have a higher density, while gas planets are mostly made of gases and have a lower density.

Front

What is the term for the closest point a planet is to the Sun?

Back

Perihelion

Front

What is the primary gas in the atmosphere of gas giants?

Back

Hydrogen

Front

What is the significance of a planet's orbit?

Back

It determines the planet's distance from the Sun and affects its climate and seasons.

Front

What is a comet primarily made of?

Back

Ice, dust, and rocky material.