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Earth's place in the Universe
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How long does it take for the Earth to complete one revolution?
365 days (1 year)
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If mass increases what happens to gravity?
Gravity increases
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If distance increases what happens to gravity?
Gravity decreases.
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Which type of tides has the biggest changes in daily tides?
Spring Tides
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What are the 2 factors that affect gravity?
Mass and Distance
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How does a lunar eclipse occur?
Earth is between the sun and moon.
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How are all galaxies formed?
Gravity
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Which object has a bigger affect on the tides and why?
The moon because its closer.
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What is it called when Earth travels around the Sun?
Revolution
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If the sun was smaller and had less gravitational pull what would happen to Earth's orbit?
It would increase and take longer to complete an orbit.
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Which factor determines the length of time it takes a planet to orbit the sun?
It's distance from the sun. Closer to the sun- shorter.
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How does a solar eclipse occur?
The moon is between the sun and Earth.
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What 2 things would happen if the Earth doubled its size?
It would have more gravitational pull and it would be closer to the sun.
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What causes Earth to have seasons?
Earth is tilted 23.5 degrees
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How many days does a moon phase last?
3-4 days (closer to 3)
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Where will you experience the least amount of change in day light?
Near the equator
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If the moon moved farther away from Earth how would that affect the gravitational pull?
Earth would have less gravitational pull on the moon.
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Why don't we have an eclipse every month.
The moon's orbit is not always in the same plane as Earth's orbit.
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Where will you experience midnight sun and polar nights?
Near the poles
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Why is the sun the center of the galaxy?
It is the biggest and has the most gravitational pull.
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What makes a planet a planet? (must name at least 2 reasons)
It must orbit a star (the sun), must have enough gravity to be round and to clear a path in its orbit.
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