| A | B |
|---|
| meniscus | curved part on the top of water in a glass graduated cilinder |
| state archimedes principle | bouyant force that pushes up on an object in a fluid is eqal to the weight of the fluid displaced by the object |
| bouyant force | the upward force exerted on an object when it is immersed in a flui. It is the weight of the fluid displaced by the object |
| state the principle of floatation | if and object floats, it displaces it's mass if an object sinks, it displaces it's volume |
| apparent weight and formula | how much an object appears to weigh in a liquid(if it floats the aw is 0) formula:AW=W in Air-BF |
| matter | anything with mass and volume(takes up space) |
| Kinetic Theory of Matter | all matter made up of tiny particles in constant motion |
| amorphous | without form-solids that do not have constructive crystals |
| sublimation | changes directly from solid to gas |
| thermal expansion | matter expands when it gets hot and contracts when it gets cold(ex. ice) |
| pressure | amount of force pushing on an object in a certain area |
| boyles' law | the volume of a fixed quanity of gas at a constant temperture is inversly perportioned to the pressure |
| charles' law | volume of a fixed quantity of gas at constant pressure increases directly with the temperature |
| element | atoms are all the same substance |
| compound | made up of atoms of 2+ elements that are chemically combined |
| pure substances | elements or compounds |
| mixtures | made up of 2+ substances-doesn't contain same amount of each-can be separated using physical methods lik filtering, sorting, evaporating, magnetism |
| homogeneous mixture or solution | a mixture in which the substances are uniformly spread out-cannot see different substances and the particles never settle |
| alloy | homogeneous mixture of two or more metals |
| heterogeneous mixture | mixture in which different materials are spread out evenly-youcan usually see the different materials |
| colloid | heterogeneous mixture that never settles |
| suspension | heterogeneous mixture that settles-contains liquid and visible particles that settle on the bottom |
| solute | dissolves in the other substance(solvent) to make solution |
| solvent | part of the solution that the other part(solute) dissolves in |
| atomic number | number of protons in the nucleus |
| quarks | very small particles that make up protons and neutrons |
| mass number | sum of the number of the number of protons and neutrons in the nucleus |
| isotope | atoms of the same element that have different numbers of neutrons |
| average atomic mass | average mass of the mixture of its isotopes |
