Review for Space Test

Front

What have visited the surface of Mars?

Back

Rovers

Front

What is the definition of orbital radius?

Back

Distance from the sun.

Front

Compared to Earth, how many days does Mars take to orbit the sun?

Back

More days.

Front

What are comets made of?

Back

Ice and dust.

Front

Where do comets come from?

Back

The Kuiper Belt.

Front

What happens to comets when they get close to the sun?

Back

They develop tails.

Front

How many stars are in our solar system?

Back

1.

Front

How big is the star in our solar system?

Back

Medium.

Front

What is the main difference between asteroids and comets?

Back

Asteroids are made of rock and metal, while comets are made of ice and dust.

Front

What is the closest planet to the sun?

Back

Mercury.