A controlled experiment is simply an experiment in which all factors are held constant except for one: the independent variable. A common type of controlled experiment compares a control group against an experimental group. All variables are identical between the two groups except the factor being tested.
hope this helps :)
if not comment and ill give you something different
Magnesium silicate is a compound of magnesium oxide and silicon. It is the magnesium salt of silicic acid containing an unspecified amount of water. The molecular formula can be expressed more clearly as MgSiO3.
Answer:
C. The point of contact between the skates and the ice
Explanation:
That is the only point of friction with the ice that provides the ability to complete the move.
B is correct. cause with microscope you look at the surface
