| A | B |
|---|
| Molecule | Atoms of two or more of the same elements bond together |
| Atom | basic unit of matter |
| Compound | Atoms of two or more different elements bonded together |
| Physical Change | When a substance under goes a change in size, shape or state(phase) that does not change the make up of the substance |
| Matter | anything that has mass and volume |
| Mass | amount of matter in an object; does not change not matter what planet you are on. |
| Conservation Law of Matter | Matter cannot be created or destroyed but only changes form. |
| States of Matter | solid, liquid, gas, plasma |
| Weight | Force that is exerted on an object due to gravity. |
| Physical Property | a characteristic that makes a substance unique from other substance; example paper will burn, water will not |
| Density | the amount of matter in a given volume |
| Element | a pure substance, cannot be broken down into a different substance |
| Periodic Table of Elements | an ordered list of all the pure substances |
| Volume | the amount of space an object takes up |
| pure substance | all the same matter, only one type of matter |
| combustability | ability to burn; flamable |
| Chemical Property | a chacteristic of a substance that changes into something else; Iron will rust; Silver will tarnish |
| Boiling Point | the temperature at which a liquid will change to a gas |
| Chemical Change | when a substance changes color, produces a gas, or becomes something else |
| gas | particles are moving freely and independently of each other with a lot of energy |
| melting point | temperature a which a solid becomes a liquid; is same as the freezing point |
| solid | particle are tightly packed and vibrating, has definite shape and definite volume |
| liquid | particles slip and slide around each other; takes the shape of container, has a definite volume |
| mixture | a combination of different substances that can be seperated easily |
