Sun-Earth-Moon System & Solar System

Impact Theory says the moon formed from gas and debris thrown off Earth after a collision.

Impacting comets may have left ice deposits at the bottom of craters.

The changing appearances of the Moon as seen from Earth _____.

The point at which the Sun reaches its greatest distance north or south of the equator ____.

People are more likely to see a total lunar eclipse than they are to see a total solar eclipse.

Earth's yearly orbit around the sun is a(n) _____.

Summer solstice begins in June in the northern hemisphere and in December in the Southern hemis

When the amount of the Moon's lighted surface seen on Earth increases _____.

When the amount of the Moon's lighted side that can be seen becomes smaller _____.

Waxing Moon phase in which one-half of the Moon's lighted side can be seen from Earth ____.

Earth is farthest from the Sun in January.

Hollow area formed on the Moon by an object striking its surface _____.

When all of the Moon's surface that faces Earth is lit up ______.

When Earth's shadow falls on the Moon ____.

The Clementine spacecraft provided data for a detailed map of the Moon's surface.

When the Moon temporarily blocks the sunlight reaching Earth _____.

Daylight hours are shorter for the hemisphere tilted toward the Sun.

Studying moonquakes scientists have been able to develop a model of the Moon's interior surface

Reached when the Sun's position is directly over Earth's equator ____.

When the Moon is between Earth and the Sun and cannot be seen _____.

An elongated, closed curve is called a(n) _____.

Waning Moon phase where only one-half of the lighted side of the Moon can be seen from Earth _.

The imaginary line around which a planet such as Earth spins is the _____.

Dark-colored, relatively flat regions of the Moon are ______.

Night and day on Earth are caused by Earth's revolution around the Sun.

Following a compass needle, pointing north, you would end up at the geographical north pole.

Earth rotates on its axis about once every year.

A total solar eclipse can only be seen by people in the area of Earth within the Moon's umbra.

The spinning of Earth on its axis is ______.

A round three-dimensional object whose surface is the same distance from center to all points.