Question

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the surface of mercury has many more craters than the surface of earth has. which of the following statements best explains why mercury has many more craters than earth has.
○ mercury is closer than earth to the asteroid belt, so it is in the path when an asteroid is knocked out of its orbit.
○ earth has a thicker atmosphere than mercury, so most of the objects that are pulled into earth’s gravity burn up before hitting the ground.
○ mercury has a stronger gravity than earth. this causes more meteoroids to be pulled toward it.
○ earth has a thinner atmosphere than mercury, so most of the objects that are pulled into mercury’s gravity burn up before hitting the ground.

Explanation:

1. Analyze Option 1: The asteroid belt is between Mars and Jupiter, so Mercury is not closer to the asteroid belt than Earth in a way that makes it more likely to be in the path of asteroids knocked out of orbit. This is incorrect.
2. Analyze Option 2: Earth has a thicker atmosphere (with gases like oxygen, nitrogen, etc.) than Mercury (which has a very thin atmosphere). When objects (meteoroids) are pulled towards Earth, they enter the atmosphere and experience friction, which causes them to heat up and burn (become meteors) before reaching the surface. So most objects don't hit Earth's surface, reducing craters. Mercury, with a thin atmosphere, can't burn up most of these objects, so they hit its surface, creating more craters. This makes sense.
3. Analyze Option 3: Earth has a stronger gravity than Mercury (Mercury's gravity is about 1/3 of Earth's). So this statement is factually wrong.
4. Analyze Option 4: Earth's atmosphere is thicker, not thinner, than Mercury's. So this statement has incorrect information about the atmosphere thickness.

Answer:

B. Earth has a thicker atmosphere than Mercury, so most of the objects that are pulled into Earth's gravity burn up before hitting the ground.