W Scientific Method Part1.x s | chrome-extension//bpmcpldpdmajfigpchkicefoigmkfa

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W Scientific Method Part1.x s | chrome-extension//bpmcpldpdmajfigpchkicefoigmkfalc/views/app.html 3. A scientist observed that white mice that were fed seeds appeared to grow more than mice given leafy green and yellow vegetables. The scientist hypothesized that the protein in the seed was responsible for the growth. He designed an experiment to test his hypothesis. He divided 200 mice of the same age, size, health, and sex into two groups of 100 mice each. The mice were kept under identical conditions for fourteen days. One group was given a diet low in protein. The other group was given a normal protein diet. The mass of each mouse was recorded daily for fourteen days a. Which group of mice served as a control group? (1 pt) b. What was the variable? (1 pt) c. What elements were controlled? (list four) (4 pts) d. What effect of a protein diet was tested? (1 pt) e. What other effects of a protein diet could have been tested? (provide at least two -2 pts) f. Why were large numbers of mice used in the experiment? (2 pts) 8. If the results of the experiment do not show a marked change between the two groups what should the scientist do next? (1 pts) h. Given the scientist's hypothesis, what do you hypothesize should happen to the of the mice in the two groups? .Mice w/Low Protein Diet (1 pt) .Mice w/Normal Protein Diet (1 pt) acer

Explanation / Answer

a) The control group is the group in the scientific experiments/studies that does not receive any treatment by the researchers and is used for comparison with other group/s of study. In the present case, therefore, control group is normal protein diet group.

b) The mass of each mouse varies and is being measured to prove the hypothesis. Hence, it is the dependent variable. The independent variable is the amount of protein fed to the two groups.

c) The variables controlled (or kept same in both the groups), as mentioned in the paragraph are -

1) Age

2) Size

3) Health

4) Sex

d) The effect being tested was 'growth' as mentioned in the paragraph.

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