Typically you use experimental and control groups in an experiment. a control group is like the default, and the experimental is the one you actually experiment with.
for example if i run an experiment on the effects of food dye on a leaf stem, i’ll have my control group (the ones without food dye) to compare to the experimental group (the ones with food dye)
the control group is a way for scientists to see how an experiment truly affected or altered the subject
Answer:
D
Explanation:
The digestive system contains many organs that break down the food you consume. The salivary glands in your mouth break down the food into small chunks, the stomach contains acid that breaks down the food further, especially the proteins, and finally the small intestine breaks down the food into molecules, which it then absorbs for the cells in your body to use.
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Answer:
C.
Coal is made from fossilized remains of ancient plants and animals. When coal is mined/burned it takes millions of years for it to be replaced.
An Area along an active fault that has not had recent earthquake activity
