Solar System

Earth's ________ on its axis causes day and night.

• rotation
• revolution
• phase
• tilt

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

• gas
• metal
• water
• rock

One kind of  _______ of the moon is a crescent.  

• axis
• asteroid
• phase
• space probe

One full orbit of an object around another object is called a ________.

• axis
• rotation
• revolution
• satellite

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

a pattern of stars that form an imaginary picture or design in the sky

• Orbit
• Rotate
• constellation
• Milky Way

The pattern of stars in a constellation stays the same, but a planet can be seen in different locations at different times because _______________.

• Stars don't move; planets revolve and rotate
• Stars and planets revolve and rotate.
• Stars not planets move
• Planets don't move; Stars revolve and rotate.

Which of the following causes seasons?

• the earths tilt and revolution
• the earths rotation
• the earths revolution around the sun
• the closeness of earth to the sun

Object orbiting another object. 

• revolution 
• rotation