adjust the height of the pan move all of the riders to zero move the beams rapidly up and down adjust the location of the mass markings
A student determines the mass of a sample on a triple-beam balance. What should the student do before determining the mass of the next sample?

Options:
- adjust the height of the pan
- move all of the riders to zero
- move the beams rapidly up and down
- adjust the location of the mass markings

move all of the riders to zero