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| contains only 1 kind of atom and cannot be broken down into simpler substances |
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| 2 or more elements chemically combined |
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| energy-rich organic compound; made of carbon,hydrogen and oxygen |
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| 3 kinds: fats, oils and waxes; cells store energy in lipids for later use |
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| large organic molecules made of carbon, hydrogen, oxygen, nitrogen and sulfur |
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| 20 common smaller molecules combined to made different proteins |
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| type of protein that speeds up a chemical reaction |
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| molecules that make up chromosomes; DNA and RNA |
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| cell membrane lets only certain things pass through |
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| movement of material from an area where colecules are crowded (high concentration) to an area where they are less crowded (lower concentration) |
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| when water molecules go into or out of a cell from a place with more molecules (higher concentration) to a place with less molecules (lower concentration) |
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| cell uses it own energy to transport a substance into or out of a cell |
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| materials pass through the cell membrane without requiring the cell's energy |
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| process where cells capture energy in sunlight and uses it to make food |
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| organism that can make its own food using sunlight and photosynthesis |
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| organism that cannot make its own food - get their energy from eating plants and other organisms that eat plants |
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| pigment in chloroplasts that absorb light and uses it to power the second stage of photosynthesis |
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| green organelles inside plant cells |
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| openings in the bottom of leaves |
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| release of energy by combining oxygen with digested food |
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| is a process where energy is released without using oxygen |
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| the regular sequence of growth and division that cells undergo |
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| the cell grows, makes a copy of its DNA and prepares to divide into 2 cells |
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| the process in which the cell lmakes a copy of DNA in its nucleus |
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| when the cell's nucleus divides into 2 new nuclei |
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| chromatin in the nucleus become short and thick |
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| the cytoplasm divides and 2 daughter cells are formed |
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