1. The triple beam balance is a first- class lever; the fulcrum is between the two weights. As the liquid in the Petri dish evaporates, which way do you think that the balance pointer will move?
A. up
B. down
C. no movement

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car

How do you calculate the mass of a product when the amounts of more than one reactant are given?