Measurements Indicate That a Certain Star Has a Very High

question 44

Multiple Choice

Measurements indicate that a certain star has a very high luminosity (100,000 times as bright as the Sun) and yet is relatively cool (3500 K) . How can this be?

• A) The star must be quite small.
• B) The star must be very large.
• C) There must be an error in observation because no star can have these properties.
• D) The star must be in the upper part of the main sequence.

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Definitions:

Testing Effect

The experimental finding that taking tests on material actually improves the learning of it even when compared with simply repeatedly studying that material.

Roediger

Refers to Henry L. Roediger III, an influential cognitive psychologist known for his research on memory, particularly the testing effect and false memories.

Cue Overload

A principle of memory that states a retrieval cue will be most effective when it is highly distinctive and not related to any other target memories.

Distinctive

Having a quality or characteristic that makes something easily identifiable and sets it apart from others.