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PLANETS
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100
How many planets are in our solar system?

8

100

rotation of Earth takes this long

24 hours

100

The sun is a medium sized ______

star
100
The inner planets are made of

rock

100

If one side of Earth is experiencing nighttime, the other is experiencing day.  What causes this to happen?

rotation

200

The third planet from the sun.

Earth

200

All planets rotate.

TRUE or FALSE

true

200

Earth is the only planet to support ______

life

200

1 day =

24 hours

200

What is the hottest planet?

Venus

300

The first four planets are called.

Inner planets

300

Each planet _______ around the sun. 

orbits or revolve


300

The moon is Earth's natural __________

satellite


300
The largest planet

Jupiter

300

The sun is a sphere of ________

burning gas.

400

The outer planets are made mostly of. 

gas

400
How long does it take Earth to revolve around the sun?

365 days

400

Earth is a sphere of _______

rock

400

The sun has _____ real surface.

no

400

The sun, Earth and moon all rotate on an ______

axis

500

The inner and outer planets are separated by.

Asteroid belt
500

Rotation means to ______

Revolution means to _______

spin

orbit or revolve

500
How many days does it take the moon to orbit around the Earth? 

29

500

Our galaxy is called:

The Milky Way

500
If gravity keeps us on Earth, what keeps the planets in space?  

gravity