| A | B |
|---|
| cell | the smallest, most basic unit of life |
| element | matter that is made of only one kind of atom |
| chemical bond | a force that holds atoms together |
| molecule | two or more atoms that are joined by chemical bonds |
| cytoplasm | the watery substance in a cell |
| cell membrane | the thin covering that holds a cell together |
| nucleus | the part of a cell that controls all the other parts |
| vacuole | an enclosed space in a cell that stores food molecules, water, and waste |
| mitchondrion | a cell part that helps the cell store and use energy |
| cellular respiration | the process cells use to release energy from food molecules |
| cell wall | the thick covering around a plant cell membrane |
| chloroplast | a plant cell part that stores a green material called chlorophyll |
| chlorophyll | the green material inside chloroplasts that absorbs sunlight so plants can make their own food |
| DNA | a molecule in the nucleus of a cell that controls many of the characteristics of living things |
