Ch 1 Earth, Moon, and Sun

One complete revolution of Earth around the sun takes about

• a. one rotation.

• b. one season.

• c. one year.

• d. one eclipse.

Earth has seasons because

• a. it rotates on its axis.

• b. the distance between Earth and the sun changes.

• c. its axis is tilted as it moves around the sun.

• d. the temperature of the sun changes.

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

• a. at the equator.

• b. farthest north.

• c. farthest south.

• d. closest to Earth.

All objects are attracted to each other by the force of

• a. weight.

• b. inertia.

• c. mass.

• d. gravity.

The strength of the force of gravity depends on

• a. the masses of the objects and their speeds.

• b. the masses of the objects and the distance between them.

• c. the weight of the objects and their speeds.

• d. the masses of the objects and their weights.

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

• a. star chart.

• b. mythological object.

• c. seasonal pattern.

• d. constellation.

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

• a. orbital speed.

• b. mass.

• c. inertia.

• d. gravity.

The phase of the moon you see depends on

• a. where you are on Earth's surface.

• b. how much of the sunlit side of the moon faces Earth.

• c. how much of the moon's surface is lit by the sun.

• d. whether or not an eclipse is occurring.

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

• a. meteor.

• b. asteroid.

• c. meteorite.

• d. comet.

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

• a. Like the moon, the stars move around Earth.

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

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

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