Astronomy I Study Guide

Why isn't there a lunar eclipse every time there is a full moon?

• Lunar eclipses happen on new moons.

• Earth's orbit is tilted as it revolves around the sun.

• The moon's orbit is tilted as it revolves around Earth.

• The Earth is tilted as it rotates.

Lunar eclipses happen when _________.

• the Earth moves into the moon's shadow.

• the moon moves into Earth's shadow.

• the moon's light goes out.

• the sun casts a shadow on Earth.

If the tilt of the moon's orbit increases, ____________.

• there will be lunar eclipses less often.

• the amount of lunar eclipses in a year will stay the same.

• there will be more lunar eclipses in a year.

• the moon will revolve around Earth at a slower rate.

If the tilt of Earth's orbit increases, ___________.

• there will be more eclipses in a year.

• there will be less eclipses in a year.

• there will be no effect on the amount of eclipses in a year.

• the Earth will revolve more slowly.

If the number of lunar eclipses increases, you can infer that _____________.

• Earth has stopped moving.

• the moon is rotating faster.

• the tilt of the moon's orbit has increased.

• the tilt of the moon's orbit has decreased.

A planet's _________ will attract other objects in space, such as a comet, and change their __________ as they revolve around the sun.

• inertia, path

• path, gravity

• inertia, gravity

• gravity, path

Objects in space, such as moons, planets, and comets, continue to revolve around (and not crash into) each other or the sun because of their _____________.

• magnetic pull/ inertia

• gravity/mass

• inertia/gravity

• mass/distance between them

The sun appears highest in the sky during the ________.

• winter

• spring

• summer

• fall

Shadows are __________ when the sun is higher in the sky and ___________ when the sun is lower in the sky.

• shorter/longer

• longer/shorter

• long/the same length

• short/the same length

Which phase of the moon comes immediately after a new moon?

• waning crescent

• full moon

• first quarter moon

• waxing crescent