Part B: Multiple Choice

11. Which hypothesis best represents the experiment below?

A student wants to make rock candy and is interested in determining if heating the water makes the sugar dissolve faster.

(A) If water is heated, then more sugar can be dissolved.

(B) If you add more sugar, then the rock candy will be sweeter.

(C) If you add more sugar, then the rock candy will be harder.

(D) If the water is heated, then the sugar will dissolve at a faster rate.

12. Which statement best describes the relationship between the independent and dependent variables?

(A) Dependent variables change in response to changes in the independent variables.

(B) Dependent variables and independent variables both change without the influence of one another.

(C) Independent variables change and dependent variables always remain constant.

(D) Independent variables change in response to changes in the dependent variables.

13. Which is an example of an observation about an earthworm?

(A) The earthworm likes warm soil.

(B) The earthworm is 95 centimeters long.

(C) The earthworm is good at crawling.

(D) The earthworm prefers the color brown.

14. Which statement best describes an inference?

(A) A mistake by the experimenter.

(B) A statement of fact, based on the five senses.

(C) An estimation of an unknown value based on given data.

(D) An opinion based on prior knowledge or experience.

15. A student predicts that similar ice cubes will melt faster in a microwave than in a pot on the stove. How should this hypothesis be tested?

(A) Measure and compare the volume of the pot and the microwave.

(B) Determine the volume of the liquid water made by each ice cube.

(C) Observe and record the time for each cube to completely change to a liquid.

(D) Identify and record the temperature of each ice cube before each trial.

16. True or False: Qualitative data represents characteristics that can’t be expressed by a number.

(A) True

(B) False

17. Place the following steps of an experiment in order by placing numbers 1-6 to the left of each step:

_______ Record/analyze data.

_______ Communicate results.

_______ Form a hypothesis.

_______ Make a conclusion.

_______ Select topic/state the problem.

_______ Conduct the experiment.

18. Which type of graph would an experimenter use in their data analysis if measuring the growth of bread mold over several days?

(A) Bar Graph

(B) Line Graph

(C) Circle graph

19. The part of an experiment where the number of times that a level of the independent variable is tested, reducing the effects of chance errors on the overall results is known as ___________.

(A) scientific law

(B) repeated trials

(C) theory

(D ) variables