| A | B |
|---|
| amino acid | The building blocks of protein. |
| atom | Smallest unit of an element. |
| carbohydrates | The main source of energy of living things. composed of carbon, oxygen, and hydrogen. Ratio of hydrogen to oxygen is 2:1. |
| catalyst | Something that speeds up or slows down a chemical reaction. |
| compound | Two or more elements chemically combined. |
| dissaccharide | Any double sugar, two simple sugars combined chemically. |
| electron | A negatively charged particle found in an atom |
| element | A substance made up entirely of one kind of atom. |
| enzyme | Large complex protein molecules that control the speed of chemical reactions |
| fats | Lipids that are solid at room temperature |
| fatty acids | Building block of lipids. |
| glucose | A common monosaccharide that is formed during photosynthesis. |
| glycerol | A building block of lipids |
| inorganic compound | A compound that does not contain both carbon and hydrogen |
| ion | An atom that has lost or gained an electron |
| lipid | Substances that contain the elements carbon, hydrogen and oxygen. The ratio of H to O is greater than 2:1, fats and oils |
| maltose | A double sugar composed of two glucose molecules |
| monosaccharide | The simplest carbohydrate, called simple sugars. |
| neutron | A particle found in the nucleus of an atom, has no electrical charge |
| nucleic acid | Very large molecules made up of carbon, hydrogen, oxygen, nitrogen and phosphorous |
| nucleus | The center core of an atom, composed of neutrons and protons |
| oils | Lipids that are liquid at room temperature |
| organic compound | A compound that contains both carbon and hydrogen |
| polysaccharide | Long chains of sugar molecules joined together |
| pH scale | Measures whether a solution is acid, basic or neutral |
| protein | Substances made up of carbon, hydrogen, oxygen and nitrogen and sometimes sulfur |
| proton | A positively charged particle located in the nucleus of an atom |
| molecule | Smallest unit of an element or compound having properties of that substance |
| substrate | Substance changed by the action of an enzyme |
