Question

1. when earth is between the moon and the sun there is a moon.

a. new
b. full
c. crescent
d. none of the above

1. sometimes the moon looks like this and sometimes the moon looks like this w causes the moon to change its appearance in this way?

a. as the moon orbits earth, earths shadow covers the moon.
b. clouds block part of the moon from our view
c. as the moon orbits earth, we see different views of the moons sunlit sic

1. what is the rotation period of the earth?

a. 365 days
b. 29 days
c. 24 hours
d. 8 years

1. phases of the moon are caused by shadows from the earth.

a true
b. false

Explanation:

• For question 13: When the Earth is between the Moon and the Sun, the Moon is fully illuminated as seen from Earth, which is a full - moon. A new moon occurs when the Moon is between the Earth and the Sun. A crescent moon is a phase where less than half of the Moon is illuminated.
• For question 14: The phases of the Moon are caused by the relative positions of the Moon, Earth, and Sun. As the Moon orbits Earth, we see different portions of its sunlit side. Earth's shadow covering the Moon is a lunar eclipse (not the normal phase - causing mechanism). Clouds blocking the view is a temporary weather - related obstruction, not the cause of phases.
• For question 15: The rotation period of the Earth (the time it takes to complete one full rotation on its axis) is approximately 24 hours. 365 days is the revolution period (around the Sun). 29 days is approximately the lunar cycle. 8 years is an incorrect value for Earth's rotation.
• For question 16: Phases of the Moon are caused by the angle at which we view the sunlit part of the Moon as it orbits Earth, not by Earth's shadows. Earth's shadows cause lunar eclipses.

Answer:

1. b. Full
2. c. As the Moon orbits Earth, we see different views of the Moon's sunlit side
3. c. 24 hours
4. b. False