1. Which of the following statements best describes the biosphere?
A. It is a mixture of gases that contain dust particles.
B. It contains Earth’s metalcore.
C. It contains all of Earth’s water.
D. It is the part of Earth that contains living organisms.
2. Which of the following is an example of a constructive force?
A. buildings collapse in an earthquake
B. river erosion within the Grand Canyon's rock walls
C. weathering of a mountain due to rain
D. a volcano eruption
3.What is the importance of water on Earth?
A. It keeps the top layer of the geosphere cool.
B. It allows life to exist.
C. It provides ice at the poles.
D. It creates Earth’s blue color from space.
4.Roughly how many times does Earth rotate during each complete revolution?
A. 24
B. 28
C. 60
D. 365
5.Saturn’s day is roughly 10 hours. It takes about 30 years for Saturn to return to the same point in space. How do Saturn’s periods of rotation and revolution compare to Earth’s?
A. Earth’s period of rotation and revolution are both shorter.
B. Earth’s period of rotation and revolution are both longer.
C. Earth's period of rotation is longer; Earth's period of revolution is shorter.
D. Earth's period of rotation is shorter; Earth's period of revolution is longer.
6.How does gravity affect the moon?
A. It pulls the moon toward Earth.
B. It pushes the moon away from Earth.
C. It allows the moon to move in a straight line.
D. It keeps the moon from colliding with the sun.
7.Why does the sun appear to move westward across the sky during the day?
A. because Earth rotates to the east
B. because Earth rotates to the west
C. because the sun moves in a westerly direction
D. because of the way you are looking into the sky
8.How does Earth’s rotation cause day and night?
A. As Earth rotates toward the east, the sun appears to rise in the west and set in the east.
B. As Earth rotates toward the east, the sun appears to rise in the east and set in the west.
C. Earth rotates in a clockwise direction, which makes the sun appear in the sky during the day.
D. Earth’s rotation does not cause day and night; its revolution does.
My answers: 1. D.
1. D. It is the part of Earth that contains living organisms.
2. D. a volcano eruption
3. B. It allows life to exist.
4. A. 24
5. D. Earth's period of rotation is shorter; Earth's period of revolution is longer.
6. A. It pulls the moon toward Earth.
7. A. because Earth rotates to the east
8. B. As Earth rotates toward the east, the sun appears to rise in the east and set in the west.
And here's a bonus joke for you:
Why did the scarecrow win an award?
Because he was outstanding in his field!