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science science
| Question | Answer |
|---|---|
| a type of matter in which all the the atoms are the same; cannot be broken down into simpler substances. | element |
| the smallest unit of an element. | atom |
| two or more elements that are chemically combined. | compound |
| the smallest unit of most compounds. | molecule |
| a compound that does not contain carbon. | inorganic compounds |
| large organic molecules made of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur; they are needed for tissue grouth and repair and play a part in chemical reactions within cells. | proteins |
| small units that are linked together chemicaly to form large protien molecules. | amino acids |
| a protien that speeds up chemical reactions in the bodies of living things. | enzymes |
| energy-rich organic compounds, such as sugers and starches, that are made of the elements carbon, hydrogen, and oxygen. they provide the raw materials to make parts of cells. | carbohydrate |
| energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxegen. | lipids |
| are very large organic molocules made of carbon, oxygen, hydrogen, nitrogen, and phosphorus. | nucleic acids |
| is the genetic material that carries iformation about an organism that is past from parent to offspring. | DNA |
| plays an important role in the production of proteins. | RNA |
| some substances can pass through it while others cannot. | selectively permeable |
| is the process by which molocules tend to move from an area of higher concentration to an area of lower concentration. | diffusion |
| the diffusion of water molecules through a selectively permeable membrane. | osmosis |
| the movement of materials through a cell membrane without using energy. | passive transport |
| is the movement of materials through a cell membrane using energy. | active transport |
| the process by which a cell captures the energy in sun-light and uses it to make food. | photosynthesis |
| colored chemical compounds that absorb light. | pigments |
| the main pigment found in the chloroplasts of plants. | chlorophyll |
| carbon dioxide enters the plant through small openings on the undersides of the leaves. | stomata |
Created by:
vicky30
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