the earth, the moon, and the sun. astronomer what do we call a scientist who studies the planets and...
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The Earth, the Moon,
and the Sun
astronomer
What do we call a scientist who studies the planets and stars?
365 1/4 days
How long does it take for the Earth to revolve around the sun?
24 hours
How long does it take for the Earth to rotate on its axis?
the seasons
What does the tilt of the earth on its axis cause?
More direct rays from the sun cause ________.
Slanted rays from the sun cause _______.
summer
winter
Earth is the _______ planet from the sun.
third
Earth’s surface is constantly _________.
Earth’s surface is three-fourths _______.
changing
water
What 2 things make it possible for there to be life on Earth?
What is at the center of our solar system?
SUN
How much bigger is the sun’s diameter than the Earth’s?
110 times
92 - 95 million miles
How far away is the sun from the Earth?
What is the sun made of?
Hot, glowing gases
What are the dark patches visible on the sun’s surface?
What is the Earth’s only natural satellite?
the moon
250,000 miles
How far away is the moon from the Earth?
How big is the moon compared to the Earth?
One-fourth the size of the Earth
The moon has extreme temperatures. This means it is very ______ in the daytime and very ______ at night.
hot
cold
Why is it not possible for there to be life on the moon?
No air & no water
What is the moon’s surface covered with?
Craters, mountains, and flat plains
We learned about the moon when:
• Astronauts collected rocks and soil from the moon
• Astronauts set up experiments on the moon
full
What is the moon phase when we see all of the lighted side of the moon?
What is the moon phase when all of the lighted side of the moon is turned away from us?
new
When the moon is ________ we see more of the lighted side each night.
When the moon is _______ we see less of the lighted side each night.
waxing
waning
During which moon phase do we see only a very small part of the lighted side?
Crescent
During which phase do we see almost all of the lighted side of the moon?
Gibbous
During which moon phase is the moon between the Earth and the sun?
New Moon
Who believed in an earth-centered solar system?
Aristotle and Ptolemy
Who believed in a sun-centered solar system?
Galileo and Copernicus
Who built the first telescope?
Galileo