Answer:
An experiment in which only one variable is manipulated at a time is called a <u>controlled</u> experiment.
Explanation:
An inference is an assumption you can make about a character or setting that isn't DIRECTLY STATED.
Answer:
This is INERTIA. Heavier objects (objects with more mass) are more difficult to move and stop. Heavier objects (greater mass) resist change more than lighter objects. Example: Pushing a bicycle or a Cadillac, or stopping them once moving.
Explanation:
A positive control is a group in an experiment that receives a treatment with a known result, and therefore should show a particular change during the experiment. It is used to control for unknown variables during the experiment and to give the scientist something to compare with the test group.
