A boy sits half-way down a grassy slope. The force that keeps him from sliding is
O Weight
O Friction
Gravity
O Momentum

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change

Select all that apply. why are common names not a good reference to a species? common names can be in different languages common names vary with location common names vary with culture common names vary with species color

How does secondary succession differ from primary succession?