Strong Evidence for the Existence of Planetary Systems in the Process

question 96

Multiple Choice

Strong evidence for the existence of planetary systems in the process of formation around other stars comes from:

• A) spectroscopic evidence of large quantities of molecules such as ammonia and methane, which can exist only in planetary atmospheres.
• B) photographs and infrared observations of disks of dust.
• C) detection of very regular pulses of radio energy from some stars.
• D) direct photography of actual planets near other stars.

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Definitions:

Anal Stage

A phase in Freudian psychosexual development centered around the child's control over bowel movements, typically occurring from age 18 months to three years.

Defense Mechanism

Psychological strategies used by individuals to cope with reality and maintain a self-image.

Repression

A defense mechanism that involves unconscious denial of the existence of something that causes anxiety.

Subliminal Perception

Perception below the threshold of conscious awareness.