1. Match the time period with its definition.

2. The Moon always shows nearly the same face to Earth because ________.

The following diagram shows the Moon in 8 different positions in its orbit around Earth, with sunlight coming from the left. Refer to this diagram for Questions 3 through 8.

3. Which position(s) represents a new moon?

4. Which position(s) represents a gibbous moon?

5. Which position(s) represents a crescent moon?

6. Which position(s) represents a full moon?

7. At which position(s) will you see a “half moon” in which the face of the Moon is half bright and half dark?

8. Assuming there is no eclipse, is Earth’s shadow falling on the Moon at any of these phases?

9. Consider the orientation of the Moon’s orbit that is highlighted in the red box below. What types of eclipse are possible when the Moon’s orbit has this orientation relative to Earth and the Sun?