What are the basic perfixes of the si measurement system

Chemistry worksheet - i am not sure what they are asking for exactly?

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

Which characteristics affect ocean water’s temperature? check all that apply. depth location mass salinity waves