| A | B |
|---|
| balance | a tool used to measure mass |
| graduated cylinder | a tool used to measure volume by analyzing water displacement |
| spring scale | an instrument that gives a true measure of weight |
| thermometer | an instrument used to measure temperature |
| degrees | the unit used to measure temperature |
| element | made up of only one type of atom |
| protons, electrons, neutrons | particles within an atom |
| atom | the basic building block of all matter |
| mass | the amount of matter in an object |
| air resistance | the type of friction that opposes the motion of an object through air |
| gravity | the force that prevents objects on earth from getting lost in space |
| friction | a contact force (meaning that two objects or surfaces must touch one another) |
| force | a push or a pull that acts on an object |
