Solar System

The four terrestrial planets are known for their _________

• hot temps
• deep atmospheres
• rocky surfaces
• large size

A force of attraction between any two objects is called _____________.

• static electricity 
• rotation
• gravity
• orbit

What is a planet?

• a swirling ball of gases
• a star
• a huge ball made out of rock
• a large object that orbits a star

Which is NOT an inner planet?

• Mercury
• Venus
• Earth
• Jupiter

Which planet is between Venus and Mars?

• Earth
• Neptune
• Mercury
• Jupiter

Mercury, Venus, Earth and Jupiter are the inner planets

• True
• False

Earth and the other planets closest to the Sun are made mostly of _______

• gas
• metal
• water
• rock

Why does Earth have different seasons? 

• because of the distance between Earth and the sun 
• because of the speed of Earth as it rotates on its axis 
• because of the amount of light blocked by the moon on its axis 
• because of the tilt of Earth on its axis as it moves around the sun 

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

• revolution
• orbit
• rotation

As the Earth travels around the sun, this tilt causes different areas of the Earth’s surface to get different amounts of daylight at different times of the year. The angle of the Sun’s rays to the surface also causes areas to have more or less of the Sun’s energy. This causes the ________.

• months
• day and night
• seasons
• years