S,MP,T Quiz 2

Crescent

Partly, but less than half illuminated

First-Quarter Moon

The phase of the moon in which the right half is illuminated, and the left half is dark

Full Moon

The phase of the moon in which it is visible as fully illuminated; occurs when the moon is on the opposite side of the Earth from the Sun

Gibbous

More than half but less than fully illuminated

Lunar Eclipse

Occurs when the moon passes through the shadow of the Earth

Moon Phase

The appearance of the illuminated portion of the moon as seen by an observer on Earth

New Moon

The phase of the moon that occurs when it passes between Earth and the Sun

Solar Eclipse

Occurs when the moon goes in front of the Sun and blocks most of the Sun's light from the Earth

Third-Quarter Moon

The phase of the moon in which the left half of the moon is illuminated and the right half is dark

Waning

The part of the moon phases where the illumination is decreasing; left side of the moon is illuminated

Waxing

The part of the moon phases where the illumination is increasing; right side of the moon is illuminated

Eclipse

An event during which one object in space
casts a shadow onto another.

Penumbra

A region of lighter shadow that may surround an umbra; for example, the spreading cone of lighter shadow cast by a space object.

Umbra

The dark, central region of a shadow, such as
the cone of complete shadow cast by an object.