The Moon-Earth's Satellite
Why dose the moon shine?
It reflects the sunlight back to Earth
How long dose the moon take to rotate on its axis and orbit Earth (tidal locked)?
How long is the lunar cycle?
The lunar cycle (new moon to new moon) is 29.5 days
What is a phase?
The different forms the moon's disc takes in its appearance from Earth
What are waxing phases?
More and more of the moon's near side is lit each night
What is a waxing crescent?
First visible thin slice of moon
What is a first quarter?
Half the lighted side of moon is visible
What is waxing gibbous?
More than one quarter is visible
What is a full moon?
All the moon's lighted side is visible
What are waning phases?
Less and less of the illuminated half of Moon is visible after a full moon.
What is a waning gibbous?
Starts after a full moon when more than half of lit side of moon is still visble
What is a third quarter?
Only half the moon's lighted side is visible
What is a waning crescent?
Last visible slice before a new moon
What is a solar eclipse?
Moon is between Earth and the sun. Moon casts shadow on Earth.
What is a lunar eclipse?
Earth is between sun and moon. Earth casts a shadow on moon.
What are features on the moon's surface?
Maria, craters, and highlands
What is Maria?
Dark, flat areas formed from lavav 3-4 billion years ago. Good for landing space carft.
What are Craters?
Large, round pits caused by impacts of meteoroids
What are highlands?
Oldest, most highly-cratered regions on the Moon
What are two tides?
Spring tides and neap tides
What are Spring tides?
When moon is in line with sun and Earth. Occurs during new moon and full moon. Greatest difference between hogh and low tide.
What are neap tides?
When moon is at a right angle to sun and Earth. Occurs during 1st and 3rd quarter moon. Least difference between high and low tide.
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