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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 |