One complete revolution of Earth around the sun takes about __________________________________.

• one rotation

• one season

• one year

• one eclipse

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.

In the Southern Hemisphere, the summer solstice occurs when the sun is ________________________________.

• at the equator.

• farthest south

• farthest north

• closest to Earth.

All objects are attracted to each other by the force of ________________.

• weight

• mass

• inertia

• gravity

The strength of the force of gravity depends on __________________________.

• the masses of the objects and their speed.

• 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

• mythological object

• seasonal pattern

• constellation

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

• orbital speed

• mass

• inertia

• gravity

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.

When a meteoroid enters Earth's atmosphere, it produces a streak of light called a(n) ______________________________.

• meteor.

• asteroid.

• meteorite

• comet.

The constellations seem to move as the seasons on Earth change. What causes this?

• Like the moon, the stars move around Earth.

• As Earth revolves around the sun, we have a different view of the stars.

• As the Earth rotates on its axis, we see different parts of the sky.

• Just as the seasons on Earth change, so do the seasons on stars.