You measure water in two containers:a 10-mL graduated cylinder with marks at every mL, and a 1-mL pipetmarked at every 0.1 mL. If you have some water in each of thecontainers, and add them together, to what decimal place could youmeasure the total?
A. 0.01 mL
B. 0.1 mL
C. 1 mL
D. 10 mL
E. none of these

Which change will decrease the number of effective collisions during a chemical reaction? a. adding a catalyst b. increasing the surface area c. decreasing the temperature d. increasing the reactant concentrations e. increasing the volume of the reactants

Why is it important for scientists to review and repeat the work of other scientists? 1.a scientific theory must be tested three times before it is proven. 2.the scientific method only applies to repeated experiments. 3.an experiment may have had errors that the scientists didn't recognize. 4.the results of individual scientists may be influenced by bias. 5.an experiment must be performed twice before the data can be analyzed.

When can a hypothesis be elevated to the status of a theory? a) when it is validated by an experiment b) when data gathered from an experiment precisely fits predictions c) when it can be proved to be true d) when it meets the test of repeated experimentation