Would it take more wave energy to deposit sand or the rocks shown on a rocky beach?

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is the most likely effect on the ecosystem? a-an increase in biodiversity. b-an increase in immigration to the area. c-a decrease in available water. d-a decrease in plant growth.

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

Explain in your own words what caused pangea to separate and why we don't worry about earthquakes in florida.