Earth and Moon

One complete revolution of Earth around the sun takes about

• a day
• a year
• a month
• 2 months

Earth has seasons because

• it rotates on its axis.
• the distance between Earth and the sun changes.
• its axis is tilted as it moves around the sun.
• the temperature of the sun changes.

All objects are attracted to each other by the force of

• gravity
• inertia
• mass
• weight

The strength of the force of gravity depends on

• the masses of the objects and their speeds.
• the masses of the objects and the distance between them.
• the weight of the objects and their speeds.
• the masses of the objects and their weights.

A pattern or grouping of stars imagined by people to represent a figure is a

• star chart
• constellation
• zodiac
• seasonal pattern

It takes approximately this long for Earth to make one complete rotation on it's axis:

• 24 hours
• a year
• 29.5 days
• eleven months

The tendency of a moving object to continue moving in a straight line or a stationary object to remain in place is called

• inertia
• gravity
• zodiac
• star chart

The phase of the moon you see depends on

• where you are on Earth’s surface.
• how much of the sunlit side of the moon faces Earth.
• how much of the moon’s surface is lit by the sun.
• whether or not an eclipse is occurring.

Which two seasons begin with an equinox?

• spring
• summer
• fall
• winter

Which two seasons begin with a solstice?

• spring
• summer
• fall
• winter