Review Ch 7 Lesson 1,2,3

Because Mercury’s mass is so small, it

• A. does not rotate.

• B. has no atmosphere.

• C. has a surface that is not solid.

How many outer planets are there?

• 4
• 8
• 9
• 20

True or False
The Earth is the center of the solar system.

• True
• False

Day and night is caused by the _____________ of earth on its axis.

• revolution
• orbit
• rotation

which planet rotates in the opposite direction?

• neptune

• saturn

• venus

• moon

Uranus is different that other planets because it rotates on it's side. 

• True
• False

This is the first planet in the solar system.

• MERCURY

• EARTH

• MARS

• VENUS

Which is the hottest planet?

• Mercury
• Venus
• Earth
• Neptune

The difference between a moon and a planet is...

• A moon is made of rock, a planet is made of gas
• Moons can only be seen with a telescope
• Moonss revolve around a planet, planets revolve around a sun
• That's no moon... ITS A SPACE STATION!

What is the difference between the inner planets and the outer planets?

• The outer planets are smaller than the inner planets 
• The inner planets are smaller than the outer planets
• The outer planets have more rocks than the inner planets
• the inner planets are heavier than  the outer planets