What Does an Elliptical Galaxy Contain

question 39

Multiple Choice

What does an elliptical galaxy contain?

• A)mostly lower main-sequence stars and giants
• B)mostly upper main-sequence stars
• C)mostly upper main-sequence stars and gas and dust
• D)roughly equal numbers of upper and lower main-sequence stars

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Definitions:

Volunteer Bias

The phenomenon in research where volunteers may differ from the general population in significant ways, potentially leading to skewed results due to the self-selection of participants.

Conditioning

A method of changing behavior where an individual learns to link a new behavior with a stimulus that was previously not related to it.

Research

The systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions.

Cognitive Perspective

A psychological approach that emphasizes mental processes such as perception, memory, thought, and problem solving, and how they may influence behavior.