A. solar energy
the earth is warmed by the sun, which is solar (or infrared).
I'm pretty sure it's B because carbon atoms are in all living organisms. They can also be bonded in different varations.
Carbonic acid.............................................
In a solid, molecules are packed together, and it keeps its shape. Liquids take the shape of the container. Gases spread out to fill the container. Solid is one of the three main states of matter, along with liquid and gas.
Hope that helps!
Answer: Combustion changes the potential chemical energy into kinetic energy in the form of heat. For combustion an organic wood combines with oxygen already in the air and undergoes a chemical reaction that gives off carbon dioxide,water,and energy in the form of heat and light.
