hiv, the virus that causes aids, is transferred through body fluids. people once thought that hiv infections were untreatable. now, many people live relatively long and healthy lives despite being infected with hiv. this is possible because science helped develop new medicines. treat inherited diseases. change societal attitudes. formulate new laws.

Astudent proposes this hypothesis in class: "if i make the angle of a ramp steeper, then a ball rolling down the ramp will be going faster when it hits the ground.” which part of a hypothesis should the student add to this that could also be tested in other experiments? an explanation based on prior scientific knowledge or observations an explanation of how the hypothesis will inspire new questions an independent variable that the student controls during the experiment an independent variable that is affected by the other experimental variable