The Crab Nebula Is the Result of a Supernova Explosion

question 8

Multiple Choice

The Crab Nebula is the result of a supernova explosion of a star that occurred at a distance of about 1.84 kpc from Earth. If people first saw the explosion in A.D. 1054, when did the explosion actually occur?

• A) about 1048 A.D.
• B) 786 B.C.
• C) 1054 A.D., of course
• D) about 4946 B.C.

Recognize the various sources of research ideas.

Identify proper methods for developing a research hypothesis.

Know the role of serendipity in scientific discoveries.

Understand the characteristics of a theory.

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Definitions:

Measurements

The process of obtaining quantitative data or the magnitude of something using standard units.

Experimental Groups

Groups in scientific research that receive the intervention or treatment being tested, as opposed to a control group which does not.

Control Groups

In experimental research, groups of participants who do not receive the experimental treatment, used as a benchmark to measure the effects of the treatment.

Probability Samples

Sampling methods in research that give each member of a population a known chance of being selected, facilitating the generalization of results to the larger population.