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Earth Science 2023-24 > Earth System History > Flashcards

Earth System History Flashcards

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1
Q

What are the three components of Earth’s system History?

A

physical, chemical, biological

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2
Q

what is a system?

A

group of related elements that function together as a whole

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3
Q

what is a component

A
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4
Q

What is a physical component

A

tangible component of something

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5
Q

What is matter?

A

anything made up of atoms occupies space and has mass

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6
Q

What is chemical component?

A

identity, arrangement, ratio of elements making up a compound

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7
Q

What is a biological component?

A

living components

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8
Q

what is uniformitarianism?

A

the laws of nature have not changed over time

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9
Q

What is the principle of superstition?

A

oldest rocks and fossils ae at the bottom, new ones are on top

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10
Q

What is a strata?

A

layer of rock

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11
Q

what happens when there are no fossils in strata?

A

There was a mass extinction

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12
Q

when do gene pools change?

A

population shrinks, non-random mating, mutations in genes, movement in/ out of population, natural selection

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13
Q

why do populations shrink?

A

diseases, extinctions, introduction of better species, predators

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14
Q

what is non-random mating?

A

organisms choose strongest mate

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15
Q

why are there mutations in genes?

A

genes change, environment decides

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16
Q

What is Movement in/out of population?

A

immigration, geneflow

17
Q

what is natural selection?

A

adaptations to the environment, ones that do good take over ones who do bad

18
Q

how old is the universe

A

13.7 billion

19
Q

what is the most widely accepted theory for the origin of the universe

A

The Big Bang Theory

20
Q

What is recombination?

A

sub-atomic particles come together

21
Q

what is inflation?

A

rapid expansion

22
Q

what are the 4 eons

A

hadeon, archeon, Proterozoic, phanerozoic

23
Q

What are the 3 eras?

A

Paleozoic, Mesozoic, Cenozoic

24
Q

what are three eons in the Precambrian

A

Hadean, Archean, Proterozoic

25
Q

how much does the Precambrian account for Earth’s history

A

87%

26
Q

what is the Hadean Eon characterized by?

A

Earth’s initial formation from gases and dust, and planetesimals, and by the stabilization of Earth’s core, development of the atmosphere and Oceans

27
Q
A
28
Q

What do meteorites do for the Earth when they bombard with it

A

the Earth increases in size, also bringing water and amino acids

Earth Science 2023-24 (8 decks)

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