Module H Unit1 Lessons 1-2: Sun-Earth-Moon; Seasons

On one clear night, the moon is high in the sky when the sun sets. It is no longer visible after 11 p.m. Which describes the motion of the moon on this day? Select all that apply.

• A. The moon traveled from east to west.
• B. The moon rose after the sun set.
• C. The moon set before 11 p.m.
• D. The moon rose during the daytime.

The apparent motion of the sun, including daytime and nighttime, is caused by Earth’s _____________________.

• axis tilt
• rotation
• orbit around the sun

How does the daily cycle of daytime and nighttime depend on Earth’s rotation?

• A. The sun rises in the west and sets in the east because Earth rotates west to east.
• B. It is morning on the part of Earth that is turning into the sun and evening on the part that is turning away from the sun.
• C. The Northern Hemisphere experiences daytime while the Southern Hemisphere experiences nighttime because Earth rotates around its axis.

Stars appear to move because Earth spins toward the _________________. People who live in the eastern United States see _________________________ stars in the night sky as those who live in the western United States.

• east ; different
• east ; the same
• west ; different
• west ; same

An _______________________is the path that a body follows as it travels around another body in space.

• orbit
• rotation

Use the Earth-sun-moon model. Which statements are true about the stars? Select all that apply.

• A. On a given day, you will only be able to see the stars that are in the opposite direction of the sun.
• B. At opposite sides of Earth’s orbit around the sun, a person at the same location on Earth would see the same stars in the night sky.
• C. The different rising times of constellations in the night sky during the year provide evidence that Earth moves around the sun.

Polaris is also called the North Star because Earth’s North Pole points toward it. As Earth rotates, other stars seem to spin around Polaris in a counterclockwise direction. In one day, the stars will make one complete circle (360°) around Polaris. Compare the positions of the constellations in the two diagrams. How many hours have passed between the first and second diagrams?

• A. 1 hour
• B. 6 hours
• C. 12 hours
• D. 24 hours

Why does the moon appear to change shape throughout each month?

• A. The fraction of the moon that is lit by the sun changes.
• B. Different parts of the moon become visible from Earth as the moon rotates.
• C. Different parts of the sunlit area are visible from Earth due to motions in the Earth-sun-moon system.

What phase does #1 & #5 show?

• full moon
• waxing
• new moon
• waning

What moon phase does # 2 show?

• full moon
• waxing
• waning
• new moon