| A | B |
|---|
| collide | hit |
| collision | crash |
| particle | one atom, two atoms or more bonded together |
| bonded | stuck together |
| atoms | what everything in the universe is made of |
| rate | how often something happens in a set amount of time |
| gas | a state of matter with particles far apart |
| solid | a state of matter with particles tightly bonded |
| liquid | a state of matter where particles only have weak bonds |
| heat | a type of energy (particles moving) |
| kinetic | movement |
| temperature | measured in Celcius with a thermometer |
| frequency | how often something happens |
| occur | happen |
| increase | more |
| decrease | less |
