Term Definition
element a type of matter in which all the atoms are the same cannot be broken down into simpler substances
atom the smallest unit of an element
compound two or more elements that are chemically combined
molecule the smallest unit of a compound
organic compounds a compound that contains carbon
inorganic compounds a compound that does not contain carbon
proteins lage organic molecules made of carbon, hydrogen, oxygen, nitrogen and sometimes sulfur they are needed for tissue growth and repair and play a part in chemical reactions within the cells
amino acids small units that are linked together chemically to form large protien molecules
enzymes a proteins that speeds up a chemical reaction in the bodies of living things
carbohydrates energy rich organic compounds, such as sugar and starches, that are made of elements carbon, hydrogen and oxygen, they provide the raw materials to make to make parts of the cells
lipids energy rich organic compounds
science chapter 2

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