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37 Cards in this Set
- Front
- Back
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How old is the universe? |
13.8 billion years |
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When does conventional history start? |
At the advent of writing |
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When did the first stars and galaxies form? |
12.7 billion years ago |
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When did the Earth form? |
4.5 billion years ago |
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When was the first single-celled organism created? |
3.8 bn years ago |
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When did the first multicellular organism form? |
540 million years ago |
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When did the dinosaurs go extinct? |
65 million years ago |
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When did humans and chimpanzees split from their last common ancestor? |
7 million years ago |
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When did the first homo sapiens emerge? |
250 000 years ago |
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When did humans leave Africa? |
64 000 years ago |
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When did the American Indians reach the Americas? |
14 000 years ago |
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When was spacetime created? |
In the Big Bang |
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Where does Big History start? |
At the creation of spacetime |
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What is CBR? |
A detectable trace of the tiny temperature variations shortly after the Big Bang |
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What is the First Law of Thermodynamics? |
Matter and Energy cannot be created or destroyed. |
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What were the two first elements to form? |
Hydrogen and helium - and a tiny pinch of lithium |
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When did matter and radiation begin to separate? |
380 000 years after the Big Bang |
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How can matter be described? |
Congealed energy |
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At what temperature can radiation begin to move freely around the universe? |
5000 degrees Fahrenheit |
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What does CBR stand for? |
Cosmic Background Radiation - known as the fingerprint of the universe - evidence for the big bang |
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What did Edwin Hubble discover? |
Red shift - the universe is expanding |
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Who hypothesized the Big Bang? |
George Lemaitre - Belgian Catholic priest |
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Who discovered CBR? |
1960s - Bell Laboratories New Jersey - Arno Penzias and Bob Wilson |
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What is life? |
- metabolism - taking energy from surroundings - homeostasis - regulating changes internally - reproduction - through replication of DNA deoxyribonucleic acid - adaptation - through mistakes in the copying of DNA |
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What are the ingredients needed for life |
- Complex chemical compounds (DNA and RNA) |
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What are the goldilocks conditions needed for life? |
- Energy and warmth - right amount - Water to help atoms bond Earth has all the right conditions |
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What links all living things? |
DNA - deoxyribonucleic acid |
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What are the four letters of DNA code? |
GACT |
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When did Charles Darwin live? |
1809 - 1882 |
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What is natural selection? |
When variations in an organisms traits improve its chances of survival and are carried forward into future generations. |
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When did Darwin publish On the Origin of Species? |
1859 |
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Who is Dmitri Mendeleev? |
The creator of the Periodic Table |
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Properties of alkali metals? |
- soft - shiny - extremely reactive - react with the right side of pt |
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Properties of alkaline earth metals? |
- reactive but not as much as alkali metals |
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Transition metals |
- iron nickel gold platinum |
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Halogens? |
- extremely reactive gases |
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Lanthanides and actinides? |
- bit at the bottom of the pt - very similar to each other |
