What energy transformation occur in a hydroelectric power plant

What is the difference between an igneous, sedimentary and metamorphic rock

There are only about 250,000 known fossil species. true or false

Which pair of sentences is describing the same velocity? a. a car is parked. a car is moving in circles. b. a bus drives 40 miles per hour north. a truck drives 50 miles per hour north. c. a boy walks east at 6 kilometers per hour. a girl walks west at the same speed as the boy. d. valerie rides her bike south at 8 kilometers per hour. owen jogs south at 8 kilometers per hour.