Term
| How old do geologists believe the Earth is, and hold do cosmologists believe the Universe is? |
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Definition
Earth: 4.56 billion years old
Universe: 13.7 billion years old |
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Term
| Using the "geoyear" analogy, how old is the Earth and the Universe? |
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Definition
Earth: 1 year
Universe: 3 years |
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Term
| Who was the first individual to scientifically attempt to date the age of the Universe? |
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Definition
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Term
| What are the two mechanisms by which a redshift of light from a distant object can take place? |
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Definition
Light gets stretched towards red as plantes move away (Right)
Photons lose energy as they leave gravity wells (Wrong) |
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Term
| What physical characteristics does the Big Bang hypothesis predict for the Universe? |
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Definition
Expanding Universe
75% H, 25% He (1/1,000,000th other)
Background radiation signature (Plankium spectrum, isotropic, 5 Kelvin) |
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Term
| What are four the fundamental forces in the Universe and which is the weakest? |
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Definition
Gravity (weakest)
Strong nuclear
Weak nuclear
Electromagmetic |
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Term
| How do elements with up to 26 protons in the nucleus get created, and how do elements with more than 26 protons get created? |
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Definition
Up to: Fusion in stars
More than: Supernovas (or regular novas) from shockwaves |
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Term
| When in the geoyear history do the first stars and novas appear? |
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Definition
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