The cycles of matter in Earth’s systems are driven by movement of

A. heat.

B. rock.

C. water.

D. air.

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?