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physics exam fall
| Question | Answer |
|---|---|
| building blocks of matter and smallest parts of particles of an element | atoms |
| a substance made of only one kind of atom | element |
| lightest element | hydrogen |
| 2nd lightest element | helium |
| atoms are slowest in..... | solids, liquids, gases |
| said matter was made of atoms because of studying chemical reactions | john dalton |
| jiggling of particles that are just large enough to be seen | brownian motion |
| smallest particle of a substance consisting of two or more atoms that bond together by sharing electron | molecule |
| the time it takes for one back and forth motion of a pendulum | period |
| a complete back and forth motion is | vibration |
| high points on a wave | crest |
| low point on a wave | troughs |
| distance between successive identical parts of a wave | wavelength |
| distance from a midpoint to a crest | amplitude |
| vibrations per unit of time | frequency |