Unit 1B Study Session

Name

Period

• 4th
• 5th
• 6th
• 7th

1. The distance between which of these is the shortest?

• Earth and Sun
• Moon and Sun
• Earth and Mars
• Earth and Moon

2. Each year, Earth revolves once around

• Mars.
• Venus.
• the sun.
• the moon.

3. It is about 28 days from one full moon to the next. This is because 28 days is about the time it takes for one

• revolution of the moon around the Earth
• revolution of Earth around the Sun.
• rotation of the Sun.
• rotation of Earth.

4. Which picture demonstrates rotation?

• A
• B
• C
• D

5. Which statement BEST explains why there is not atmosphere on the Moon?

• The temperature of the Moon varies too much to develop an atmosphere.
• The Moon does not have enough gravity to hold an atmosphere.
• The Moon revolves too quickly to keep an atmosphere.
• The density of the Moon is too great to allow an atmosphere.

6. A solar eclipse occurs when

• A)Earth blocks the Moon from the Sun.
• B)the first four planets are in a line.
• C)the Moon blocks Earth from the Sun.
• D)the last four planets are in a line.

7. Use the diagram below to answer this question. When the Sun, the Moon, and Earth are in the same line as shown, which of the following could occur?

• A)an eclipse of the Sun
• B)an eclipse of the Moon
• C)The Moon could be pulled closer to Earth.
• D)The spin of Earth could be increased.

8. Why does the amount of daylight change during the course of a year?

• A)The amount of light and heat radiated by the Sun changes at different times of the year.
• B)The distance between the Sun and Earth changes from summer to winter.
• C)The North Pole points more toward the Sun at one time of the year than another.
• D)Earth rotates at different speeds at different times of the year.