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Geology > Week 1 > Flashcards

Week 1 Flashcards

1
Q

Which plate boundary spreads apart and creates crust?

A

Divergent

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2
Q

Which plate boundary collides and destroys?

A

Convergent

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3
Q

Which plate boundary slides by one another?

A

Transform

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4
Q

What is considered thin crust?

A

Oceanic

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5
Q

What is considered thick crust?

A

Continental

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6
Q

What are the five blocks? LARGEST to SMALLEST order

A

Eons, eras, periods, epochs, ages

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7
Q

What are the four eons?

A

Hadean, Archaen, Proterozoic, and Phanerozoic

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8
Q

What is the Hadean eon?

A

1st eon; earth’s cooling period; AKA priscoan

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9
Q

What is the Proterozoic eon?

A

beginning of diversity /prototypes; example is jellyfish

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10
Q

What is the Archaen eon?

A

ancient life; single celled; cyanobacteria and archaebacteria

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11
Q

What is the Paleozoic era?

A

ancient marine life; sharks

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12
Q

What is the phanerozoic eon?

A

Visible life divided into 3 eras

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13
Q

What is the Mesozoic era?

A

age of dinosaurs; divided into triassic, jurassic, cretaceous periods

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14
Q

What is the Cenozoic era?

A

time of modern life and mammals; tertiary and quaternary

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15
Q

What is an atom?

A

smallest unit of element that has properties

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16
Q

What kind of charge is a Proton?

A

Positive

17
Q

What kind of charge is a Neutron?

A

No charge

18
Q

What kind of charge is a Electron?

A

Negative

19
Q

The number of protons is ____?

A

Constant

20
Q

How do isotopes helps us date things?

A

Radioactive decay is measured

21
Q

What are isotopes?

A

varieties of atom produced by variations of neutrons in nucleus; helps us date things

22
Q

What are ions?

A

electronically charged atoms produced by gain or loss of electrons

23
Q

Why do atoms become ions?

A

to form minerals

24
Q

Halite, commonly known as salt

A

halide

25
Q

What is ionic bonding?

A

transfer of electrons

26
Q

What is covalent bonding?

A

sharing of electrons

27
Q

What is polar covalent bonds?

A

unequal sharing

28
Q

Calcite is a member of what group?

A

Carbonate

29
Q

Galena and sphalerite are members of what group?

A

Sulfides

30
Q

minerals

A

naturally occurring; inorganic crystalline solids

31
Q

glasses

A

noncrystalline and amorphous (without proper shape)

32
Q

rocks

A

made from minerals; igneous, sedimentary, metamorphic

33
Q

volatiles

A

gas and vaporized

34
Q

What is considered oceanic crust?

A

basalt, magnesium, iron.

35
Q

What is considered continental crust?

A

granite, felsic, feldspar

Geology (4 decks)

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