1. The amount of friction is determined by A. the kind of surface
B. the force between the surfaces
C. the temperature
D. both A and B

Now it's your turn to investigate human impact around the world. grab your virtual lab coat and put on your environmental science hat. you will be taking a trip around the globe to explore three locations. at each location, you will investigate the cause and effect relationships of deforestation, desertification, and urbanization. you will also gather evidence of how these factors have impacted the environment over time

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

The cluster of developing cells from conception until birth is called an