EMS EOU Assessment (Retake)

Last updated almost 3 years ago

6 questions

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3

Tania went outside and made two observations of the Moon that were several days apart. Her observations are shown in the diagram above. 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 Tania 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, the Moon rotated so that more of the light-colored rock on the Moon’s surface faced Earth.

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

The diagrams above show Earth and the Moon in different positions, as seen from above (top view). Sunlight is coming from the left, but these diagrams do not show what parts of Earth or the Moon are light or dark.

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 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.

How does light travel?

Light travels in straight lines only.

Light travels like a river, wherever there is an open path.

Light travels in unpredictable ways.

It depends; if the light is bright enough it can change direction.

Shira looked up one night and saw a full moon. How long will it be before she can see a full moon again?

About one week.

About one month.

There is no way to tell because the Moon’s pattern is always changing.

It could be two weeks or a month, depending on what time of year it is.

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.

The Moon is always moving back and forth across Earth’s sky.

Felipe believes that whenever the Moon is in the position that is shown from above (top view) in Diagram A, the Moon always looks completely bright in the view from Earth, as shown in Diagram B.

Is Felipe correct? If he is correct, explain why the Moon always looks bright from Earth in that position, and explain how he should show light on the Moon in Diagram A. If he is incorrect, explain how else the Moon can look when it is in that position.

Tania went outside and made two observations of the Moon that were several days apart. Her observations are shown in the diagram above. 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 Tania 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, the Moon rotated so that more of the light-colored rock on the Moon’s surface faced Earth.

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

The diagrams above show Earth and the Moon in different positions, as seen from above (top view). Sunlight is coming from the left, but these diagrams do not show what parts of Earth or the Moon are light or dark.

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 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.

How does light travel?

Light travels in straight lines only.

Light travels like a river, wherever there is an open path.

Light travels in unpredictable ways.

It depends; if the light is bright enough it can change direction.

Shira looked up one night and saw a full moon. How long will it be before she can see a full moon again?

About one week.

About one month.

There is no way to tell because the Moon’s pattern is always changing.

It could be two weeks or a month, depending on what time of year it is.

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.

The Moon is always moving back and forth across Earth’s sky.