During the Whirlybird experiment, we tested the affect of mass (number of paper clips) against the time it took the whirlybird to reach the ground. Adding paper clips was the variable that we as experimenters changed. What is the name for this type of variable?

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Compare and contrast solutions and suspensions