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Physics ch. 13

QuestionAnswer
Most of the Mass of the Universe is (be careful) dark matter
Dark matter is made of we don't know
Doppler shift for galaxies is usually toward red
The discovery of dark energy means that the expansion of the universe is accelerating
In the Big Bang Theory there is no center to the universe
What was made in the first 4 minutes after the Big Bang (all that apply) hydrogen, helium
To become a black hole, an object must have enough mass that the escape velocity exceeds c
Dark energy makes the Universe speed up
When you look at a galaxy 5 billion light years away, you see this galaxy as it was 5 billion years ago
Who is famous for his estimate of extraterrestrial intelligence? Drake
The expansion of the Universe is accelerating. Physicists attribute this to dark matter
To make a black hole, we need high mass in a small radius
Most of the mass in the universe is made of planets
Oxygen and nitrogen were created within a star
What is Nemesis a theoretical star that orbits the Sun, making comets and asteroids veer toward Earth
light from the Andromeda Galaxy reaches us in several millions of years
The Age of the universe is closest to 10 billion years
For the Earth to become a black hole, it would have to be reduced to the size of a coin
If the sun were made into a black hole, it's radius would be approximately a few kilometers
If we turn the Sun into a black hole, then the force on the Earth will be unchanged
Choose all of the following that are NOT part of our solar system the Andromeda Galaxy
A galaxy is a large collection of stars
A light year is a distance
Created by: mwest