What Do Radio Maps of the Spiral Arms of Our

question 39

Multiple Choice

What do radio maps of the spiral arms of our galaxy show?

• A)They reveal that our galaxy is a grand design spiral.
• B)They map the location of dense neutral hydrogen clouds.
• C)They reveal that the Sun is currently located in the centre of a spiral arm.
• D)They map the location of hot O and B stars by the radio radiation they emit.

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Definitions:

Internal Validity

The extent to which a study can demonstrate that a causal relationship exists between variables, free from external influences.

Construct Validity

The extent to which a test measures what it claims to be measuring, in the context of psychological testing and research.

Mundane Realism

Refers to whether the setting of an experiment physically resembles the real world.

Reactance

An unpleasant emotional response that people often experience when someone is trying to restrict their freedom.