Earth, Moon and Sun Review

Why does Atia’s diagram show that it’s brighter on the left half of the Moon?

• Because there is a shadow from Earth falling on half of the Moon, and Atia’s diagram is showing that shadow on the right half of the Moon.
  

• Because as the Moon gets closer to the sun more of it is lit by the sun, so Atia’s diagram is showing sunlight on half of the Moon.

• Because Atia’s diagram is showing that the half of the Moon that is facing the sun is lit by the sun, and the other half is dark.

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2. Connor went outside and made two observations of the Moon that were several days apart. The light part of the Moon appeared to get larger over time. Why did this happen?

• Between the first observation and the second observation, the Moon moved so that Connor was able to see more of the half that faces the sun.

• Between the first observation and the second observation, the Moon moved closer to the sun so more sunlight reached the Moon’s surface.

• Between the first observation and the second observation, Earth moved so its shadow was blocking less of the Moon so Connor was able to see more of it.

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How does light travel?

• It can bend around objects.

• In a straight line.

• Light travels in unpredictable ways.

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Look at the picture. Which diagram shows the amount of light from the sun on the moon accurately?

• Diagram A

• Diagram B

• Diagram C

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Which of these things is true about the Moon?

• The Moon is always moving around Earth in a circle.

• The Moon is always in the same position in Earth’s sky.

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

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Look at the diagram in the picture. Could the half of the Moon that faces Earth ever be completely dark in any of these diagrams?

• No, the Moon is always lit by the sun.

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

• Yes, always in Diagram 3 and sometimes in Diagram 1.

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

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This diagram shows Earth and the Moon from above (top view). Why is there a circle drawn in this diagram?

• To show the locations where the sun’s light can reach the Moon.

• To show that the Moon is always moving around Earth in a circle- the Moon's orbit around Earth.

• To show the way that the Moon can move back and forth across Earth’s sky.

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Ryan looked up and saw that it was a full Moon. How long will it take for there to be a full Moon again?

• about 1 week

• 1 day

• about 1 month

• Never again

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Lulu went outside to see the Moon. Several days later when she observed the Moon from her little porch she noticed the Moon was not as bright and the light appeared to get smaller. Why did this happen?

• Between the first photograph and the second photograph, the B moved farther away from the sun so less sunlight reached the Moon’s surface.

• Between the first photograph and the second photograph, Earth moved so its shadow was blocking more of the Moon so the student astronomer was able to see less of it.

• Between the first photograph and the second photograph, the Moon rotated so that less of the light-colored rock on the Moon’s surface faced Earth.

• Between the first photograph and the second photograph, the Moon moved so that the student astronomer was able to see less of the half that faces the sun.

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This diagram is showing the Sun, Earth Moon model from above. Could the Moon ever be completely dark as seen from Earth in any of these diagrams?

• No, the Moon is always lit by the sun.

• Yes, in Diagram 2 only.

• Yes, in Diagram 1 only.

• Yes, always in Diagram 2 and sometimes in diagram 1.

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