Large asteroids are thought to collide with Earth
A) A few times in every million-year period
B) About once a century
C) Once every billion years
D) Never -- only comets are thought to collide with Earth
Answer: A
Large asteroids are thought to collide with Earth
A) A few times in every million-year period
B) About once a century
C) Once every billion years
D) Never -- only comets are thought to collide with Earth