Based on Many Surveys of the Average Density of Matter

question 20

Multiple Choice

Based on many surveys of the average density of matter in the universe (regular matter and dark matter) , astronomers now conclude that the average density of the universe is

• A) less than the critical density
• B) exactly equal to the critical density
• C) more than the critical density
• D) essentially equal to zero
• E) so great that the universe will experience a "big crunch" before the Sun becomes a red giant