DES Unit 1: Sun, Earth, Moon Relationships

Created by dolandese 

Upgrade to
remove ads

Moon Phases

The changing appearances of the Moon as seen from Earth

Crescent Moon

the moon phase in which we see less than half of the moon's sunlit side

First Quarter Moon

when the right half of the sunlit side of the moon is visible

Third Quarter Moon

when the left half of the sunlit side of the moon is visible

Lunar Eclipse

the blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon

Solar Eclipse

occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth

Rotation

spinning of Earth on its imaginary axis, which currently takes about 24 hours to complete and causes day and night to occur

Revolution

the movement of an object around another object such as the Earth orbiting around the Sun.

Apogee

farthest point from the earth in the orbit of a celestial body such as the Moon

Perigee

closest point from the earth in the orbit of a celestial body such as the Moon

Geocentric Model

A representation of the universe in which stars and planets revolve around Earth. Ptolemy proposed the model.

Heliocentric Model

A representation of the relationship between the Sun and planets in which the planets revolve around the Sun. Copernicus proposed the model.

Retrograde Motion

Apparent backwards motion of the planets in Earth's sky

Umbra

The darkest part of the shadow cast by the Moon on the Earth or the Earth on the Moon

Penumbra

The light outer portion of the shadow cast by the Moon on the Earth or the Earth on the Moon

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set