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UNIT 2A TEST Flashcards

1
Q

4 eras of geologic time (oldest-youngest)

A
  1. Precambrian
  2. Paleozoic
  3. Mesozic
  4. Cenozoic
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2
Q

Precambrian Landform+Biological detail

A

Bio- single celled organisms
Land- Canadian Sheild

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3
Q

Paleozoic land+bio

A

Bio- trees/shelled animals
Land- Appalachian Mountain

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4
Q

Mesozic land+bio

A

Bio- dinosaurs/trees
Land- Innuition Mountains

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5
Q

Cenozoic land+bio

A

Bio- mammals, humans
Land- rocky mountains

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6
Q

The Earth is _____ yrs old

A

4.6 Billion

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7
Q

Composition of the earth #1

A

1- crust= 16-48 Km

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8
Q

Composition of the earth #2

A

2- Mantle= convection current redistribute heat to crust

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9
Q

Composition of the earth #3

A

3- OUTER CORE= liquid- responsible for Earths magnetic field

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10
Q

Composition of the earth #4

A

4- Inner Core= solid/pressure keeps it from melting

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11
Q

Continental Drift Theory v.s Plate Tectonic Theory
who???

A

Who
CDT- Alfred Wegner
PTT- Tuzo Wilson

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12
Q

Continental Drift Theory v.s Plate Tectonic Theory
year???

A

CDT- 1915
PTT- 1960’s

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13
Q

Continental Drift Theory v.s Plate Tectonic Theory
Theory???

A

CDT- all continents once together
PTT- convection currents moved plates

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14
Q

Continental drift theory called

A

super continent pangea

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15
Q

Continental drift theory includes

A

all lands

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16
Q

Plate tectonic theory has __ prices of evidence

17
Q

5 prices of evidence for Plate tectonic theory

A
  1. Coastline
  2. Fossil
  3. Geologic Fit
  4. Paleoglation
  5. Paleoclimatology
18
Q

Convection Currents are

A

large slow moving currents
redistribute heat from the core towards the crust

19
Q

subduction

A

when a thin ocean plate slides underneath a thick continental plate

20
Q

what can subduction cause

A

tsunamis, earthquakes, trench, volcanoes

21
Q

Converge

A

2 continental plates come together and buckle (fold/fault) to create mountains

22
Q

what can convergence cause

A

earthquakes

23
Q

Divergence

A

2 ocean plates move apart and magnetic comes up from the mantle which cools once it comes in contact with water/air

24
Q

what does divergence form

A

forms ridges

25
Q

Features at plates
Eurasian/Australian Plate

A

Himalayas Mountains

26
Q

Features at plates
Nasca/ South America

27
Q

Features at plates
North AM/ South AM/ African

A

Mid Atlantic

28
Q

Features at plates
Pacific/ Juan Du Fuca

A

rocky mountain

29
Q

Transform Boundary + what does it cause

A

2 plates moving opposite directions building pressure until 1 slips
causes- earthquakes

30
Q

4 stages of ice age

A
  1. Change in orbit
  2. change in tilt
  3. Albedo Effect
  4. Great snow storms

CGC1D (2 decks)

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