When it is spring in the Northern hemisphere, what season is it in the Southern hemisphere? a. spring b. summer c. autumn d. winter

When is Earth's axis tilted neither toward nor away from the sun? a. summer solstice b. winter solstice c. summer and winter solstices d. vernal and autumnal equinoxes

Which phase takes place when the moon's surface is not visible? a. full moon b. quarter moon c. harvest moon d. new moon

In the Northern Hemisphere, the sun is highest in the sky during the ____. a. vernal equinox b. summer solstice c. autumnal equinox d. winter solstice

As Earth revolves around the sun, Earth's axis ____.

A man observes the moon in the sky (see picture). Which number on the diagram demonstrates the position of the moon when the man makes his observation? a. Number 1 b. Number 4 c. Number 6 d. Number 8

As we go from summer to winter in the Northern Hemisphere, _______.

Which phase occurs when the moon is between Earth and the sun? a. full moon b. new moon c. quarter moon d. harvest moon

How long does it take for Earth to rotate once? a. 365 days b. 28 days c. 24 hours d. 1 hour

During which phase of the moon does a lunar eclipse occur? a. first quarter b. last quarter c. new d. full

When a solar eclipse occurs, ____. a. Earth's shadow falls on the moon b. Earth's shadow falls on the sun c. the moon's shadow falls on Earth d. the moon's shadow falls on the sun

The main cause of the seasons is _____. a. variations in the sun's energy b. the changing distance of Earth from the sun c. the changing speed of Earth's revolution d. Earth's axis is tilted

The tilt of Earth's axis explains why we have ______. a. days and nights b. meteor showers c. seasons d. tides