Vocabulary

1. a colorless, odorless gas produced by burning carbon and organic compounds and by respiration
4. a green pigment, present in all green plants and in cyanobacteria, responsible for the absorption of light to provide energy for
8. a hierarchical series of organisms each dependent on the next as a source of food.
9. energy that is transferred by electromagnetic radiation
10. energy is just the force that causes things to move. Energy is divided into two types: potential and kinetic
12. a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction

2. a colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.
3. a biological community of interacting organisms and their physical environment.
5. equiring complex organic compounds of nitrogen and carbon
6. the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
7. is the potential of a chemical substance to undergo a chemical reaction to transform into other substances
11. a plastid that contains chlorophyll and in which photosynthesis takes place.