Answer:
Friction: Rubbing your hands together to create heat
Conduction: Putting your body parts over something warm, for example a fire
Radiation: Laying in the sun to soak up the warmth
Answer:
A control group setup in an experiment is used to see if there are other variables in play during the experiment. Say I was to test which type of blood is a shark's favorite, my control would be putting red paint in one of the set ups to see if the shark is just interested in the red color of blood, instead of the other types of blood.
Explanation:
Descriptive data = valid data
