In Part 1 of this experiment, the was intentionally manipulated. This was the independent variable. The dependent variable measured was the . In part 2 of this experiment, the was intentionally manipulated. This was the independent variable. The dependent variable measured was the .

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.