Space Unit Review

One complete revolution of Earth around the sun takes about

• one rotation

• one season

• one year

• one day

All objects are attracted to each other by the force of

• weight

• mass

• inertia

• gravity

the strength of the force of gravity depends on

• mass and speed

• mass and distance

• weight and speed

• mass and weight

why doesn't gravity cause the Earth to crash into the sun

• the rotation of the Earth

• objects in motion stay in motion

• Earth is too big

• none of these

The phase of the moon you see depends on

• where you are on Earth's surface

• how much of the bright side of the moon faces Earth

• Gravity

• whether or not an eclipse is happening

Earth's rotation takes about

• 365 days

• 6 months

• 24 hours

• 1 month

Day and night are caused by

• Earth's revolution around the sun

• Earth's rotation on its axis

When are the tides the highest

• during 1st quarter of the moon

• when the sun, Earth, and moon line up

• during 3rd quarter of the moon

• when the moon is at a right angle to the sun

Tides are caused by

• Earth's rotation on its axis which moves the water

• differences in how much the sun pulls on the water

• strong winds

• how much the gravity of the sun and moon pull on the Earth

which planet goes around the sun fastest?

• mercury

• earth

• saturn

• neptune