| A | B |
| Matter | Anything that has mass and takes up space (volume) |
| Solid | has a definite shape, mass, and volume |
| Liquid | does not have definite shape, but they do have definite mass and volume |
| Gas | has a definite mas, but does not have definite shape or volume |
| States of Matter | Forms of matter in everyday experiences: solids, liquids, gases (also referred to as phases) |
| Mass | Measure of how much matter objects are made of |
| Volume | Amount of space that matter occupies (takes up) |
| Density | The mass of a material in a certain volume |
| Weight | Measure of the force of gravity on your mass |
| Temperature | Average kinetic energy of all the particles in a material; measured by a thermometer in degrees – usually in Fahrenheit (°F), Celsius (°C) or Kelvin (K) |
| Energy | Ability of a system to do work – this is required for changes to happen within a system |
| Gravity | Force that attracts objects to each other (depends on the masses and distance of the objects) |