Question

question 5 of 10
why is there so little evidence of the period of heavy bombardment on earth?
a. asteroids burn up in earths thick atmosphere.
b. earths magnetic field prevented asteroids from striking earth.
c. the moons gravity prevented asteroids from reaching earth.
d. weathering, plate movements and volcanoes destroyed many of the craters.

Explanation:

Earth's weathering processes like erosion, plate - tectonic movements that recycle the crust, and volcanic activity that can cover or reshape the surface have destroyed many of the craters that would have been formed during the Period of Heavy Bombardment. Asteroids burning up in the atmosphere doesn't explain the lack of evidence of old craters. Earth's magnetic field doesn't prevent asteroid impacts. The moon's gravity doesn't prevent asteroids from reaching Earth.

Answer:

D. Weathering, plate movements and volcanoes destroyed many of the craters.