Rotation & Revolution
Earth's orbit around the sun is called __________ and Earth spinning on it's axis is called __________.
revolution, rotation
noncontact
There are ______ phases in the lunar cycle and it starts with the __________.
8, new moon
How long does it take Earth to revolve around the sun?
365 1/4 days
What are the 2 things that affect the strength of gravity?
mass and distance
The phase where half of the moon is lit is called a _______ moon.
quarter
How long does it take Earth to make one complete rotation?
24 hours or 1 day
The pull of gravity between the sun and pluto is less or greater than the pull of gravity between the sun and earth?
less
The lunar cycle lasts __________ days or about _______.
29.5 days or 1 month
Earth tilts on it's ________ at 23 degrees.
axis
True or False. Gravity is the only thing keeping the planets in orbit around the sun.
False- gravity and inertia
The phase where more than half of the moon is lit is called a _________ moon.
gibbous
Earth's rotation causes _____________ and Earth's revolution causes us to have different ____________.
day and night, seasons
Why is the pull of gravity on the moon less than the pull of gravity on earth?
Earth has more mass than the moon, so it has more gravity.
When the light is increasing and the light is on the right side of the moon it is ________. When the light is decreasing and the light is on the left side of the moon it is ___________.
waxing, waning