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science vocabulary
Term | Definition |
---|---|
law of conservation of mass | mass cannot be created nor destroyed just change forms |
reactant | the materials of the reaction that cause it to happen |
product | the materials formed from the reaction |
flammablility | able to burn or catch on fire |
precipitate | materials 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 |
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 table |
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 2 transmit electricity heat |
unconformity | when a rock disturbs a series of undisturbed layers |
law of superstion | in an undisturbed set layer of rock the younger rock is on top and the oldest rock is on the bottom |
half-life | 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 |
divergent boundary | when plates move away from eachother and form mid-ocean ridges and new crust |
transform boundary | when plates slide or rub against each other forming faults and earthquakes |
fault | a break or fracture in rock layers |
igneous rock | rock formed by material from volcanos |
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 atmospheric information of an area |
geologic time scale | the organization of the earths history that connects events the happened to the structure of the earths to the changes in the organisms |
mantle | 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 |
pangaea | 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 | |
reservior | |
cold seep | |
phytoplankton | |
deep ocean (bentic zone) | |
brackish water | |
chemosynthesis | |
upwelling | |
salinity | |
shore (intertidal zone) | |
open ocean (pelagic zone) | |
tributary | |
eutrophication |