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science science

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