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

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

About how long does it take for the moon to revolve once around Earth? a. 7 days b. 14 days c. 28 days d. 365 days

Where must the moon be in its orbit so that the full moon phase is visible? a. between Earth and the sun b. exactly crossing Earth's orbit of the sun c. on the side of Earth opposite the sun d. directly above one of Earth's poles

What happens during a lunar eclipse? a. Earth passes between the sun and the moon b. The moon passes between the sun and Earth c. The sun passes between Earth and the moon d. Earth, the sun, and the moon are at right angles in space.

Which statement is true regarding the moon's orbit?

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

During which tide is there the least amount of difference between high and low tides? a. spring tides b. neap tides c. rip tides d. summer tides

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

Which phase of the moon follows a waning crescent and comes before a waxing crescent? a. new moon b. full moon c. quarter moon d. harvest moon

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 the visible part of the moon increases each night, the moon is said to be ________. a. full b. new c. waning d. waxing

When is the sun directly overhead at the equator? a. summer solstice b. winter solstice c. summer and winter solstices d. vernal and autumnal equinoxes