Dark, Unknown Forms of Matter Appear to Make Up About

question 167

Multiple Choice

Dark, unknown forms of matter appear to make up about what fraction of the mass of a typical rich cluster of galaxies?

• A) one-half
• B) 90%
• C) much less than 1%
• D) 10%

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Personal Benefit

An advantage or profit gained from a situation or action that directly affects an individual on a personal level.

Trumpet

A brass wind instrument with a flared bell and bright, penetrating tone, often used in classical and jazz music.

Writing

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Absence

The state of being away from a place or person, or the neglect to perform a duty or requirement.