According to the Most Recent Data from Satellites Making Precise

question 16

Multiple Choice

According to the most recent data from satellites making precise measurements of the properties of the cosmic background radiation (CBR) ,

• A) normal matter (like the atoms in our bodies) makes up 99% of the total mass-energy of the universe
• B) dark matter makes up less than 5% of the total mass-energy of the universe; it's only a minor contributor to what makes up the cosmos
• C) the dark energy makes up just a little less than 70% of the density of the universe, making it the most significant constituent of the mass-energy
• D) normal matter, dark matter, and dark energy each contribute about 1/3 of the total density of the universe - their contributions are almost exactly equal
• E) the universe is only about 6,000 years old
• Section 29.6: The Inflationary Universe

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