1. material thrown out from an impact crater settles to form which of the following structures?
a) central peak
b) wall
c) ray
d) rim
2. moon rocks resemble rocks from which of earth layers?
a) crust
b) mantle
c) inner core
d) outer core
3. which of the following best explains why few impact caters are found on earth?
a) erosion has erased most of the impact craters on earth
b) few impacts have occurred on earth
c) impacts on earth do not form craters
d) most impacts occurred before earth was formed