For items 3-7: A group of students was asked to investigate how well powdered juice dissolves in cold and in hot water. If it is to be a fair test, what variables should they control? Choose three variables.
A. manner of stirring
B. amount of powdered juice
C. size of powdered juice particles
D. temperature of water
3. _____
4. _____
5 _____
6. What is the independent variable in the investigation?
I. the temperature of water
II. the amount of powdered juice that completely dissolves in cold water
III. the amount of powdered juice that completely dissolves in hot water
IV. how long it takes for the powdered juice to completely dissolve
A. I only
B. II and III
C. I, 11, and 111
D. II, III, and IV
7. What is the dependent variable? (What is being measured?)
A. I only
B. II and II
C. I,!1, and III
D. II, lll, and IV​