question below:
Which two factors determine the gravitational attraction between two objects?
answer below:
mass and distance apart

question below:
In which oceanic zone do clams and crabs survive by burrowing in the sand?
answer below:
intertidal

question below:
Naturally occurring variations within a species are mainly the result of mutations and
answer below:
sexual reproduction

question below:
Why would explorers use a compass when traveling to unknown lands?
answer below:
to locate a direction to travel