An imaginary line that runs through Earth from the North Pole to the South Pole; Earth spins around this line.

The angle at which Earth's axis leans (about 23.5 degrees); this tilt causes seasons.

When one object in space blocks the light from another object, creating a shadow on Earth or the moon.

When Earth moves between the sun and moon, and Earth's shadow falls on the moon, making the moon appear dark or reddish.

When the moon moves between the sun and Earth, blocking the sun's light and casting a shadow on Earth.

The different shapes the moon appears to have as it orbits Earth; caused by how much of the lit side we can see.

The phase when the moon is between Earth and the sun; the moon is not visible from Earth.

The phase when Earth is between the sun and moon; we see the entire lit side of the moon.

When the moon appears to be growing larger each night (RIGHT SIDE ILLUMINATED)

When the moon appears to be shrinking each night (LEFT SIDE ILLUMINATED)

The movement of one object around another (Earth revolves around the sun; the moon revolves

When an object spins on its axis (Earth rotates once every 24 hours).

A day when day and night are about equal length; happens twice a year (spring and fall).

The darkest part of a shadow during an eclipse.

The lighter outer part of a shadow during an eclipse.

A day when one hemisphere receives the most sunlight (summer solstice) or least sunlight (winter solstice).

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Earth in Space Study

Earth in Space Study Guide: Phases of the Moon, Seasons, and Eclipses

Question	Answer
Axis	An imaginary line that runs through Earth from the North Pole to the South Pole; Earth spins around this line.
Axial Tilt	The angle at which Earth's axis leans (about 23.5 degrees); this tilt causes seasons.
Eclipse	When one object in space blocks the light from another object, creating a shadow on Earth or the moon.
Lunar Eclipse	When Earth moves between the sun and moon, and Earth's shadow falls on the moon, making the moon appear dark or reddish.
Solar Eclipse	When the moon moves between the sun and Earth, blocking the sun's light and casting a shadow on Earth.
Moon Phase	The different shapes the moon appears to have as it orbits Earth; caused by how much of the lit side we can see.
New Moon	The phase when the moon is between Earth and the sun; the moon is not visible from Earth.
Full Moon	The phase when Earth is between the sun and moon; we see the entire lit side of the moon.
Waxing	When the moon appears to be growing larger each night (RIGHT SIDE ILLUMINATED)
Waning	When the moon appears to be shrinking each night (LEFT SIDE ILLUMINATED)
Revolution	The movement of one object around another (Earth revolves around the sun; the moon revolves
Rotation	When an object spins on its axis (Earth rotates once every 24 hours).
Equinox	A day when day and night are about equal length; happens twice a year (spring and fall).
Umbra	The darkest part of a shadow during an eclipse.
Penumbra	The lighter outer part of a shadow during an eclipse.
Solstice	A day when one hemisphere receives the most sunlight (summer solstice) or least sunlight (winter solstice).

Created by: user-2015943

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