The Earth, the Moon, and the Sun

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The Earth, the Moon, and the Sun
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astronomer
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365 1/4 days
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24 hours
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the seasons
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More direct rays from the sun cause ________.
summer
Slanted rays from the sun cause _______.
winter
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Earth is the _______ planet from the sun.
third
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Earths surface is constantly _________.
changing
Earths surface is three-fourths _______.
water
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What 2 things make it possible for there to be
life on Earth?
Water Air
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What is at the center of our solar system?
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How much bigger is the suns diameter than the
Earths?
110 times
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92 - 95 million miles
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What is the sun made of?
Hot, glowing gases
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What are the dark patches visible on the suns
surface?
Sunspots
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What is the Earths only natural satellite?
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250,000 miles
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How big is the moon compared to the Earth?
One-fourth the size of the Earth
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The moon has extreme temperatures. This means it
is very ______ in the daytime and very ______ at
night.
hot
cold
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Why is it not possible for there to be life on
the moon?
No air no water
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What is the moons surface covered with?
Craters, mountains, and flat plains
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We learned about the moon when

• Astronauts collected rocks and soil from the moon
• Astronauts set up experiments on the moon

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full
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What is the moon phase when all of the lighted
side of the moon is turned away from us?
new
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When the moon is ________ we see more of the
lighted side each night.
waxing
When the moon is _______ we see less of the
lighted side each night.
waning
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During which moon phase do we see only a very
small part of the lighted side?
Crescent
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During which phase do we see almost all of the
lighted side of the moon?
Gibbous
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During which moon phase is the moon between the
Earth and the sun?
New Moon
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Who believed in an earth-centered solar system?
Aristotle and Ptolemy
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Who believed in a sun-centered solar system?
Galileo and Copernicus
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Who built the first telescope?
Galileo