Why is it important to keep every variable (constants) the same, or controlled except
the variable being tested.
It is important to keep all variables the same
except the one being tested, so you know if the
tested variable is responsible for the effect.
It isn't important to keep variables the same.

A.

U whay do you need with?

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy