Q: Answer the question

Which rapid changes are caused by heat from inside Earth?

A: volcanoes

Q: Answer the question

Which item is designed to change electrical energy into heat energy?

A: Hand dryer

Q: Answer the question

In the human kidney, urea from the blood is filtered through the glomerular membrane into a nephron. The movement of urea across this membrane occurs without an input of energy. Which factor is the most likely reason urea absorption does not require energy?

A:
a concentration gradient