1.12: The Nature of Science- Challenge 2
- Page ID
- 5320
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- 1. If I want to do an experiment to test whether vitamin C helps prevent colds, the control group must ___.
- not be given vitamin C
- 2. In an experiment to test whether vitamin C prevents getting a cold or not, the sample population is divided into two groups so that one group receives the vitamin C dose and one group does not. Which of these is a control group?
- The group that doesn't receive vitamin C.
- 3. An experiment is conducted to check the effect of migraine pills on people. Out of 100 people, 50 were given migraine pills. What is the control group in this case?
- People who didn't receive migraine pills.
- 4. A ___ can become a theory if it is thoroughly tested and passes all tests, ensuring that there are no lingering problems with it.
- hypothesis
- 5. Scientists can use theory to ___.
- offer reliable explanations
- 6. What is the relationship between a theory and a hypothesis?
- If a hypothesis is supported by multiple lines of evidence, it may become a theory.
- 7. Natural selection is often described as ___.
- survival of the fittest
- 8. A fast-acting insecticide was sprayed on a large population of cockroaches. Some cockroaches that are resistant to this insecticide survived. This is an example of ___.
- survival of the fittest
- 9. ___ may have been present during times of low sea level.
- Land bridges
- 10. What are some limitations of scientific models?
- Models show only a portion of a system.
- 11. Manipulation of a model ___.
- can be done far more easily than the system it represents
- 12. A model ___.
- deals with only a portion of a system
- 13. Scientists engage in ___ review to make sure that work is of high quality prior to publication.
- peer
- 14. ___ is an evaluation of work conducted by qualified people in a field before the work is published.
- Peer review
- 15. Scientists who are part of a peer review can ___.
- recommend or deny a paper for publication