Earth, Moon, and Sun Final Quiz Review

This is a diagram of the Moon and Earth as seen from above, with sunlight coming from the left. Why is the left half of the moon brighter than the right half?

• Because the left half of the moon is being lit by the sun, but not the other half

• Because the moon has lighter colored rock on the left side

• Because there is a shadow from Earth falling on half of the moon.

The diagrams above show two moon observations several days apart. Why does the moon appear larger in the second observation?

• Between the first observation and second observation, the moon moved, so more of it was illuminated by the sun.

• between the first observation and the second observation, the moon rotated so that more of the light-colored rock on the Moon's surface faced the earth.

• Between the first observation and the second observation, Earth's shadow moved and was blocking less of the moon.

The diagrams above show Earth and the Moon in different positions, as seen from above. Sunlight is coming from the left. Could the half of the moon that faces the Earth ever be completely dark in any of these diagrams?

• No, the Moon is always lit by the sun

• Yes, always in Diagrams 2 and 3, but never in Diagram 1.

• Yes, always in Diagram 2, but never in Diagrams 1 or 3.

• Yes, always in Diagram 2 and sometimes in Diagram 3.

Light always travels in a straight line.

• True

• False

How many days does it take for the moon to complete all of its phases?

• about 1 week

• about 1 month

• about 1 year

Which of these diagrams is accurate?

• Diagram A, because the whole moon is bright as long as there are no shadows covering parts of it.

• Diagram B, because the Moon is almost as close as it can be to the sun, so the moon is almost fully lit by the sun

• Diagram C, because the half of the moon that is facing the sun is lit by the sun, and the other half is dark

Which of these is true about the Moon?

• The moon is always moving around Earth in a circle

• The moon is always in the same position in the Earth's sky

• The Moon is always moving in many changing patterns around Earth

• The Moon is always moving back and forth across the sky.

In which of the diagrams below would it be possible for a lunar eclipse?

• 1

• 2

• 3

In which of these images would it be possible for there to be a solar eclipse?

• 1

• 2

• 3

What is happening during a lunar eclipse?

• The shadow of the moon passes over the sun

• The shadow of the earth passes over the moon

• The moon blocks the light from the sun