| A | B |
|---|
| gram | base unit for mass |
| meter | base unit for length |
| volume | base unti for volume |
| balance | instrument that measures mass |
| meter stick | instrument that measures length |
| graduate cylinder | instrument that measures volume |
| atom | smallest part of an element |
| proton | positive part of an atom |
| electron | negative part of an atom |
| neutron | neutral part of an atom |
| nucleus | where the protons and neutrons are |
| atomic mass | the protons + the neutrons |
| atomic number | the number of protons as well as the number of neutrons |
| periodic table | table with elements arranged in order by their atomic numbers |
| molecule | two or more elements bonded together |
| compound | two or more different elements bonded together |
| Evaporation | liquid drops turning into a gas |
| Condensation | Gas turning back into a liquid |
| Precipitation | water fallling back to Earth |
| Melting | Water going from a solid to a liquid |
| Freezing | Water going from a liquid to a solid |
| Surface tension | water molecules "sticking" together |
| Capillary Action | Water molecules "climbing up" other substances |
| Universal Solvent | Water can dissolve more liquids than any other molecule on Earth |
| Specific Heat | The amount of energy it takes to raise water 1 degree C |
| Aquifer | groundwater |
| Solid, Liquid, and Gas | Water is the only substance on Earth occuring naturally in these |
| Estuary | Place where salt and fresh water mix |
| Wetland | An area, big or small, that is covered with water some or all of the year |
| Watershed | A land area that collects and channels water to a greater body of water |
| Divide | Ridgeline that seperates one watershed from another |
| James River | Largest watershed in VA |
| Chesapeake Bay | Largest Estuary in the US |
| Biotic | living things like plants and animals |
| Abiotic | non-living things like rocks, soil, sun and water |
| Ice Floats | Less dense than water |
| Solute | the substance that is dissolved |
| Solvent | the substance that does the dissolving |
| Estimate | when exact answers are not needed |
| Measurement | when you need exact answer and you use tools to get them |
