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Research And Scientific Methods Quiz 3 (30 MCQs)

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1. A factor that changes in an experiment in order to test a hypothesis is .....
2. The following statement is a hypothesis formed about marsh grass:If the amount of nitrogen marsh grass receives is increased, then the height of the grass will increase, because nitrogen is an essential nutrient needed for marsh grass to grow. What is the independent variable of the statement above?
3. Mr. McNiece wanted to see how different types of music affected students' pulse rates. She played different types of music:heavy metal, rap, R&B, alternative, pop, country, and classical music. Identify the independent variable.
4. An experiment is set up with ten pots to test the effective of fertilizer on plant growth. 5 pots have fertilizer added to the soil, 5 pots do not have fertilizer added to the soil. Each pot has 1 spider plant and 5 cups of soil. The pots are watered once a week with 1/2 cup of water. What is something that would need to be true of the spider plants?
5. A science researcher is reviewing another scientist's experiment and conclusion. The reviewer would most likely consider the experiment invalid if
6. In the scientific method what do you do before the hypothesis?
7. Though scientists study the world from differing perspectives, what must all scientists take into account?
8. An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate. The pulse rates of two groups of people at rest were measured. Group A was then given caffeinated soda and group B was given caffeine-free soda. One hour after drinking the soda, the pulse rates were measured. The participants in the experiment were all the same age, and they were all given the same amount of soda. The dependent variable in this experiment is the
9. Set of related hypotheses supported by evidence is .....
10. All factors that can change in an experiment.
11. This is the group that is affected by the variable or the group that is changed.
12. The development of an experimental research plan should NOT include a
13. Why do scientists consider any hypothesis valuable?
14. A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. The dependent variable is the .....
15. A pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept.
16. What is a hypothesis?
17. Jill is testing the effect of caffeine on the breathing rate of betta fish. She sets up two fish tanks with identical conditions. She places 10 betta fish in each tank. She adds caffeine to one tank and nothing to the other tank. She then counts the operculum plate movement per minute for the fish in each tank. What scientific question is the above experiment attempting to answer?
18. Which statement best expresses a basic scientific assumption?
19. To make observations you use your .....
20. A scientist is investigating a new treatment for a disease that affects thousands of people. Many people with this disease volunteer to be part of the study. Which of the following is an ethical concern that the scientist must address before conducting the study?
21. How many variables should be tested at a time?
22. A scientist is planning to carry out an experiment on the effect of heat on the function of a certain enzyme. Which would not be an appropriate first step?
23. What is a factor that changes because of what the experimenter does?
24. Which is the correct spelling of this word used in the scientific method?
25. "Last week there were no ants near the front door of our school. Now there is a large colony." This describes what kind of scientific method?
26. For Julie to make 16 muffins, she need 2 cups of flour. To make 32 muffins she needs 4 cups of flour. What is the dependent variable?
27. Identify the hypothesis to the following statement:An increased amount of car accidents have occurred in the last year because of cell phone use while driving.
28. In order to compare the effects that different types of liquid on plant growth the following experiment was conducted. One plant received water, another plant received milk, and the third plant was given orange juice. What would be the control in this investigation?
29. Which of these is NOT a type of scientific model?
30. When conducting an experiment, why do we analyze our data?
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