Chapt 24 Sec. 1-2

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1.
1 point
Earth is the made of about 70% water.
2.
1 point
Who developed the Sun-Centered model solar system?
3.
1 point
What planet is third from the Sun?
4.
1 point
The fourth planet from the Sun is Mercury.
5.
1 point
One of the main differences between the outer and inner planets is
6.
1 point
What causes Mars to appear reddish?
7.
1 point
How many moons does Mars have?
8.
1 point
How many planets are in our solar system?
9.
1 point
Why is Venus often called Earth's twin?
10.
1 point
Why does Mercury have such a thin atmosphere?
11.
1 point
Which planet is closest to the Sun?
12.
1 point
Mars and Earth have similar tilts. What other similarity does this cause the two planets to have?
13.
1 point
Which planets has craters and cliffs like Earth's moon?
14.
1 point
Which planet is second from the Sun?
15.
1 point
Why do planets closer to the Sun orbit the Sun faster than the planets farther away do?