The Sun-Earth-Moon System

How does Earth move around the Sun?

• in perfect circle
• in a straight line
• in a nearly circular path

Why does Earth revolve?

• It has a Moon
• It's axis is tilted
• The Sun's gravity pulls on it

What causes Earth's seasons to change?

• Earth's tilt on its axis
• Earth's rotation on its axis
• Earth's closeness to the Sun

What causes the phases of  the Moon to change?

• the Moon's craters
• the Moon's rotation
• the Moon's revolution

What happens during a total lunar eclipse?

• The Moon passes through Earth's umbra.
• The Moon is in new or last quarter phase.
• Part of the Sun passes through the Moon's penumbra

Where is a total solar eclipse visible?

• anywhere within the Moon's umbra
• anywhere on Earth where it is night
• anywhere within the Moon's penumbra

What causes tides on Earth?

• the gravitational pull of only the Sun
• the gravitational pull of only the Moon
• the gravitational pull of the Sun and the Moon

The day when fall or spring begins

• equinox
• solstice
• waning
• waxing

day when winter or summer begins

• equinox
• solstice
• waning
• waxing

Phase that reveals more of the Moon

• equinox
• solstice
• waning
• waxing