| A | B |
|---|
| matter | anything that has mass and takes up space |
| weight | how much gravity pulls on an object, changes when you leave Earth |
| mass | how much matter (stuff) is in an object, does not change when you leave Earth |
| volume | amount of space an object takes up |
| density | how tightly packed something is, how much matter packed into certain volume |
| formula for finding density | mass divided by volume |
| 3 states of matter | solid, liquid, gas |
| melting | solid to liquid |
| freezing | liquid to solid |
| evaporation | liquid to gas |
| condensation | gas to liquid |
| sublimation | solid to gas |
| atom | basic building blocks of matter (letters in alphabet) |
| molecule | two or more atoms joined together (words) |
| liquid | takes shape of container, has definite volume |
| solid | keeps own (definite) shape, has definite volume |
| gas | takes shape of container, no definite volume (spreads out to fill container) |
| convection | Movement of heat in a fluid. When the fluid warms, it expands (gets less dense) and rises, replaced by cooler, denser fluid. |
