Unit 5-Space, Earth, Moon and Solar System – Flashcards
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How many days does it take for the moon to go through all of its phases? Lunar cycle
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Month
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What does the Moon not have that is a requirment for life?
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liquid water
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What causes the moon's surface to change if it does not have wind or weathering?
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Meteors and astroids
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How does the size of the moon compare to the size of Earth?
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1/4 the size
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Why doesn't Earth have as many craters as the moon?
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Because they burn up in the atmosphere
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What determines a planets orbit around the Sun?
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gravity and distance from the Sun
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What keeps the moon traveling in the same orbit around the Earth?
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gravity
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What force of attraction is there between Earth and other objects?
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gravity
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Three cycles related to Earths movement:
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Day and night; Season's; and moon phases
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Why can we only see one side of the moon?
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It spins while we spin
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How long does it take the Earth to rotate on its axis?
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24 hours
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What cycle does the rotation of the Earth produce?
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Day and Night
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How long does it take the Earth to revolve around the Sun?
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365.4 days
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How long does it take the moon to revolve around the Earth?
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27.3 days
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How long does it take the moon to rotate on its axis?
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27.3 days
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What is the center of our solar system?
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the sun
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What produces solar energy?
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Nuclear fusion
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What causes the moon to appear bright in the night sky?
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reflecting the suns life
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What 2 forces balance each other to keep planets in orbit around the sun?
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Gravity and ineria
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How many times more woud you weigh on Earth than on the moon
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6x
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What causes tides?
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Pull of the Moon's gravity on Earth's ocean
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How many high tides a day?
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2
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How many low tides a day?
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2
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About how many hours between a high tide and a low tide?
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6 hours
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Wat are rilles, craters and marias?
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A landform found on the moon
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Who was the 1st scientist to use a telescope to observe the sky?
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Galileo
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What is a comet?
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A dirty snowball
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Meteoroid
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in space
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meteor
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burning up in our atmosphere
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meterorite
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hits the ground
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What is an orbit?
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A curved path an object in space
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What is an axis?
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an imaginary line that goes through planets
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What phase would the moon have to be in to see a solar eclipse?
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New Moon
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what does the moon block?
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the sun
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What is an ellipse?
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an orbit that is a shape of a flattened oval.
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What causes seasons?
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Rotating, and the axis is pointing to the north star
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What are the layers of the sun?
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core, photosphere, cromosphere, and carona
