These depressions are called and formed when asteroids and comets struck the planet.

Impact craters is the correct answer.

Explanation:

An impact crater is created in a moon or in a planet when an asteroid, comet, meteorite, or other object impacts its surface at a very high speed. It typically has a circular shape and a raised rim. These impact craters can be seen in many planets in the Solar System, and also in the Moon.

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.