Unit Test — Cumulative exam Answers

Which question is the best scientific question?

In an experiment to test a new drug’s effectiveness, one group is given a larger dosage than is typically prescribed, and a second group is given a smaller dosage than is typically prescribed. Then, the results of the groups are compared to each other. What is missing that would improve this scientific design?

A scientist is studying the effect on human health of bacteria that live in the human intestine. In her study, she found that the bacteria actually help the body’s immune response. To develop scientific consensus about her idea, the scientist should

Read the following question.“How fast do hummingbirds fly?”Why is the question a scientific question?

What is the purpose of controlling the environment when testing a hypothesis?

What is another term for the manipulated variable?

Polio is a disease that can cause paralysis. Doctors treated patients with casts and braces, but the work of Elizabeth Kenny led to the use of hot baths and exercise to treat polio victims. These patients had less incidence of paralysis. Kenny’s ideas and their acceptance were due to

What is the safest way to carry a microscope?

A lab investigation involves using food coloring to track diffusion. Which action should students take to avoid damaging their clothing?

Omar studies the effects of a drought on the depth of water in a pond. He takes a reading of the water depth at the same location in the pond every day for the duration of the drought. Which method of displaying data would he most likely use to show changes in water depth?

Which characteristic best distinguishes quantitative data from qualitative data?

Some theories are developed from repeated testing of a single hypothesis. Cell theory, germ theory, and the theory of evolution all have developed from the testing of multiple related hypotheses. Which statement best explains why some theories develop this way?

Derek needs a tool that delivers 5.00 mL of a sodium hydroxide solution. Which tool would be best for him to use?

Rebekah finds that a solution of sugar in water has a volume of 1.32 fl. oz. How should she report this amount using the metric system? (1 fl. oz. = 29.6 mL)

Gregor Mendel demonstrated that traits are passed from parents to offspring independently of one another under all circumstances that he tested. All other genetics researchers have observed this as well. Based on this information, the statement can be made that “traits are passed from parents to offspring independently of one another.” Which describes the statement of fact?

Louis Pasteur developed the germ theory of disease, which states that many diseases are caused by microorganisms. Had scientists been skeptical but not open-minded about the idea,