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stars in a galaxy are held together by ___________?
Gravity
100
Why is it hotter in summer than in winter?
Earth gets the most amount of direct sunlight in the summer.
100
Why does the Moon seem to change shape from week to week?
The Moon is lit from the sun at different angles
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The half of the moon’s surface that always faces away from the Earth is called:
the Far Side
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What causes night and day?
Earth's rotation
200
In the electromagnetic spectrum, different forms of radiation are arranged according to their
wavelength
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What are the dark areas on the moon called?
Maria or mare
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Which words describes the different shapes that the Moon appears to be?
Crescent and gibbous
200
The moon completes a full phase change cyclic in
29.5 days, approx a month
200
Earth rotates on an imaginary line running from the north and south poles called the
Axis of Rotation
300
What cause an impact crater to form on a planet’s surface?
An object from space strikes the surface
300
The dark areas on the Moon formed from
Lava-filled craters
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During a total lunar eclipse, the Moon is shadowed by Earth's umbra or earth's penumbra?
Earth’s umbra
300
A solar eclipse occurs when
The sun is blocked from view The moon gets between sun and earth Can only happen during a new moon phase
300
The Sun is made of:
70 % hydrogen and 28 % helium
400
How long does it take Earth to turn once on it’s axis of rotation?
one day
400
What are the lighter areas on the moon called?
highlands
400
The circular holes that cover the moon are called
Craters
400
The moon’s gravitational attraction pulls on earth’s water creating
A cycle of high and low tides
400
The sun is __________ year old and the universe is ____________ year old.
5 billion years- Sun 14 billion years-Universe
500
How long does it take the Moon to revolve once around the Earth?
One year
500
Why is just one side of the Moon visible from Earth?
The Moon rotates once on its axis in the same amount of time that it revolves around the Earth.
500
The half of the moon’s surface that is constantly facing toward Earth is called:
the Near Side
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From the electromagnetic radiation scale, the light that humans can see with their eyes is
visible light
500
What is the prime meridian and where is it located?
Zero Longitude where the time zones begin Greenwich, England
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