| A | B |
|---|
| Matter | anything that has mass and takes up space |
| Energy | the ability to do work or cause change |
| Mass | the amount of matter in a substance |
| Gravity | a force that pulls matter toward the ground |
| Weight | the pull of gravity on mass |
| States of Matter | the various forms matter may have |
| Solid | matter which has a definite shape and a definite volume |
| Liquid | matter which has a definite volume and takes on the shape of its container |
| Gas | matter which does not have a definite shape and expands to fill its container |
| Plasma | gaslike substance made up of positively and negatively charged particles |
| Evaporate | to change from a liquid to a gas |
| Condense | to change from a gas to a liquid |
| Kinetic Theory of Matter | All matter is made up of tiny particles in constant motion. |
| Atom | tiny pieces of matter that everything is made up of |
| Proton | positively charged particle found in the nucleus of an atom |
| Neutron | uncharged particle found in the nucleus of an atom |
| Electron | negatively charged particle which orbits the nucleus of an atom |
| Pure Substance | a substance that has the same composition throughout |
| Element | a substance made up of only one kind of atom that cannot be broken down |
| Compound | a substance formed from two or more kinds of atoms |
| Mixture | a combination of two or more substances where each maintains its own properties and can be physically separated |
| Solution | a mixture of two or more substances that cannot be separated by mechanical means |
| Homogeneous Mixture | a mixture that is the same throughout |
| Heterogeneous Mixture | a mixture of different substances that is not evenly distributed |
| Physical Property | a characteristic of a substance that you can detect with your senses without changing the substance |
| Physical Change | a change in matter such as cutting or melting that does not change its molecules |
| Chemical Property | a characteristic of a substance that allows it to change into a new substance such as flammable |
| Chemical Change | a change in matter such as rusting or burning in which there is a change in its molecules |
