PLEASE HELP ME I'M BEGGING YOU The digestive process involves two main types of digestion. Identify each one and explain how each works to break down food. Indicate where each type of digestion takes place in the body.

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

How can carbon move from "land" to bodies of water? describe the way human impact has lead to increased levels of co2 in the atmosphere.

At element makes up all organic compounds?