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science science

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