Which layer of rock is the oldest? 1. Layer A
2. Layer D
3. They are all the same age
4. There is not enough information to answer this question

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

How are fossils used to date organisms?

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen