Your class is discussing how the living and nonliving parts of ecosystems are dependent. describe how changes in the nonliving parts of an ecosystem can affect the ecosystem.

Joseph has hypothesized that sound travels in waves. if he were following the scientific method, what should he do next? a. ask a question. b. test the hypothesis. c. study the results. d. tell other scientists about his hypothesis.

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.