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.
Written Response CFS:
Accurately identifies the position of the Moon to predict the correct Moon phase
Accurately describes the relationship between light and the appearance of illuminated objects
Accurately describes the relationship between the moons position and the appearance from Earth
Three students made the diagrams above to show what they think the Moon looks like when it is seen from above (top view). In these diagrams, the sunlight is coming from the left, as shown by the arrows.
Which diagram is accurate and why?
Diagram B is accurate because the Moon is as close as it can be to the sun, and so all of the Moon is lit by the sun.
Diagram C is accurate because the half of the Moon that is facing the sun is lit by the sun, and the other half is dark.
All three diagrams are sometimes accurate because the Moon has some lighter-colored rock and some darker-colored rock, and the half of the Moon with the lighter-colored rock rotates to face different directions.
An artist took two photographs of the Moon that were several days apart. Images that look like his photographs are shown above.
The light part of the Moon appeared to get smaller over time. Why did this happen?
Between the first photograph and the second photograph, Earth moved so its shadow was blocking more of the Moon so the artist was able to see less of it.
Between the first photograph and the second photograph, the Moon moved so that the artist could see less of the half that faces the sun.
Between the first photograph and the second photograph, the Moon moved farther away from the sun so less sunlight reached the Moon’s surface.
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?
Yes, always in Diagrams 2 and 3 but never in Diagram 1.
Yes, always in Diagram 3 and sometimes in Diagram 2.
Yes, always in Diagram 3 but never in Diagrams 1 or 2.
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.
Suki looked up one night and saw a crescent moon.
If Suki looks for the Moon again in one month, what will he see?
Suki will see a crescent moon again, like Diagram A.
Suki will see a quarter moon, like Diagram B.
Suki could see either a crescent or a quarter moon; it depends on the time of year.
The diagram above shows Earth and the Moon from above (top view).
Why is there a dotted circle drawn in this diagram?
To show that the Moon is always moving around Earth in a circle.
To show the locations of satellites that are in Earth’s atmosphere.
To show the locations where the sun’s light can reach the Moon.