Which of the following are true for acceleration? a. the symbol used for acceleration is . b. acceleration is a scalar quantity. c. the si unit for acceleration is minutes per second. d. acceleration describes how the velocity changes in time.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.