How does the speed at which waves move help scientists "see" the inside layers of the earth? Select one:

Waves move more quickly through areas of high pressure and temperature.

Waves travel through more compact materials more quickly than through loose, sandy materials.

Waves’ amplitudes increase with the density of a material.

Waves travel through different materials at different speeds.

Which of the following describes something an engineer would probably do first when developing new technology meant to reduce ocean pollution? o a. evaluate the benefits and challenges of using certain chemicals to purify water. o b. research new scientific findings in regard to ocean cleanup. o c. identify the need to reduce ocean pollution. o d. research what has been done in the past to clean up oceanic oil residue.

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? what is the pebble's speed when it has fallen 29.4 m ?

What happens in a global convection cell