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science vocab
| Term | Definition |
|---|---|
| law of conservation of mass | mass cannot be created nor destroyed, just change forms |
| reactant | the material of the reaction that cause it to happen |
| product | the material formed from the reaction |
| flammability | able to burn, or catch on fire |
| precipitate | material formed as a result of chemical change |
| phase change | changing from one state of matter to another |
| chemical change | reaction that forms a new substance evidence includes: formation of precipitate change of temperature , change of color, and formation of a gas (bubbles) |
| physical property | characteristic that can be observed with your senses or measured |
| period | a row on the periodic table |
| group or family | a column on the periodic able |
| atomic mass | the average number of protons and neutrons in an atom |
| element | a pure substance that has the 2 or more of the same atoms |
| compound | two or more elements chemically bonded, example water |
| conductivity | able to transmit electricity, heat |
| unconformity | when rock disturbs a series of undisturbed layers |
| law of superposition | in an undisturbed set layer of rock, the younger rock is on top and the oldest rock is on the bottom |
| half-time | when the amount of a radioactive element is decreased by half after a period of time |
| absolute dating | using radioactive elements to determine the EXACT age of a fossil,rock,or artifact. |
| relative dating | using the law of superposition and index fossils to give an estimate of a fossil or rock layers |
| index fossils | fossils that we know the exact age, but use it for a comparison |
| convergent boundary | when plates push together and form mountains |
| transform boundary | when plates slide or rub against each other and form mid-ocean ridges, and new crust |
| fault | a break or fracture in rock layers |
| igneous rock | rock formed by material from volcanoes |
| weathering | breaking down of rock by movement (mechanical), interactions with living things (biological) and reactions (chemical) |
| ice core | a sample of ice that shows the atmosphere information of an area |
| geologic time scale | the organization of the earth history that connects events that happened to the structure of the earth to the changes in the organisms |
| mantel | middle layer of the earth that causes the tectonic plates to move |
| convection current | cycling of material-warm material is less dense and rises, cooler material is more dense and sinks. |
| pangae | supercontinent that existed over 250 mya |
| theory of continental drift | theory that explains how the continents move |
| erosion | movement of sediment by wind, water |
| esturary | |
| polarity | |
| cohesion | |
| adhesion | |
| groundwater | |
| impermeable | |
| permeable | |
| glacier/ice cap | |
| solvent | |
| aquifer | |
| river basin/ water shed | |
| ocean current | |
| reservoir | |
| cold seep | |
| phytoplankton | |
| deep ocean (benthis zone) | |
| brackish water | |
| chemosynthesis | |
| upwelling | |
| salinity | |
| shore (intertidal zone) | |
| open ocean (pelagic zone) | |
| tributary | |
| eutrphication | |
| fdd |
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