You get out of school and walk north for 20 minutes. You travel 1.6 km. What is your average velocity?

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?

In which part of the body is a ball-and-socket joint found?

As a result of climate change earths temperature is rising and sea ice is melting what is a likely effect? answer : populations of walruses and polar bears will decline