Earth and Its Moon

A(n) ______ is an imaginary line about which a body rotates.

• axis
• winter solstice
• revolution

During the ______, the North Pole is at its greatest tilt away from the sun.

• summer solstice
• vernal equinox
• winter solstice

During a(n) ______, Earth passes directly between the Moon and the Sun.

• solar eclipse
• lunar eclipse
• summer solstice

Apparent changes in the shape of the Moon throughout the month are called ______.

• Moon phases
• Earth changes
• revolution

When the ______ occurs, spring begins in the Northern Hemisphere.

• autumnal equinox
• June 21
• vernal equinox

The North Pole is tilted directly toward the Sun during the ______.

• summer solstice
• August
• vernal equinox

When the Moon passes directly between the Sun and Earth, a(n) ______ occurs.

• lunar eclipse
• solar eclipse
• axis

The ______ marks the first day of fall in the Northern Hemisphere.

• autumnal equinox 
• June 21
• winter solstice

During a total ______, part of Earth's surface is in the umbra of the Moon's shadow.

• March 20
• solar eclipse
• lunar eclipse

The path of Earth's ______ is elliptical.

• circle
• rotation
• revolution