7th Chemistry
| Description: | 7th Grade Chemistry Vocabulary |
| Category: | Chemistry |
| Created by: | malinda_michaud on 2008-12-01 |
| Question | Answer |
| Element | a pure substance that cannot be speartated into simpler substances by physical or chemical means |
| Compound | a pure substance composed of two or more elements that are chemically combined |
| Molecule | a neutral group of atoms held together by covalent bonds |
| Chemical Property | a property of matter that describes a substance based on its ability to change into a new substance with different properties |
| Physical Property | a property of matter than can be observed or measured without changing the identity of the matter |
| Mixture | a combination of two or more substances thata are not chemically combined |
| Solution | a mixture that appears to be a single substance but is composed of particles of two or more substances that are distrubuted evenly throughout the mixture |
| Malleable | able to be pounded into thin sheets withoug shattering |
| Ductile | able to drawn or pulled into a wire |
| Soluble | the ability to dissolve in another liquid |
| Conductivity | able to carry an electrical current |
| Density | the amount of matter in a given space or volume; the mass per unit volume of a substance |
| Chemical Change | the composition of matter changes |
| Physical Change | the composition of matter stays the same but the appearance changes in some |
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algae- plant-like protists energy- defined as the ability to grow or change. the SUN directly or indirectly. its main source is main source on ENERGY. food- all organisms need some type of food for nutrients. CELL ribosomes- very tiny organelles, on which new PROTEINS are formed. cytoplasm- jelly like substance surrounding the nucleus. cell wall- non-living structure that surrounds the plant cell (outside the cell membrane/ gives the cell shape and support. nucleolus- small, usually round structure found with nucleus. endoplasmic reticulum- NETWORK OF MEMBRANES that run through the cytoplasm. CARRY MATERIALS to all aparts of the cell. |
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