Exam 1 Flashcards

1
Q

a____ is a tentatice, testable, statement about the general nature of the phenomenon observed

A

hypothesis

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2
Q

____notice something: collect data, see something interesting

A

Observation

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3
Q

_____How to check which, if any, explanation is correct

A

Testing

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4
Q

______a well substantiated explanation that can incoperate facts, laws, logical inferences and tested hypotheses not a good guess

A

Theory

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5
Q

4 steps of scientific method

A

observation
hypothesis
testing
repeat as needed

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6
Q

what are the 5 major world oceans

A
Pacific
Atlantic
Indian 
Southern (antarctic)
Arctic
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7
Q

the largest ocean is

A

Pacific

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8
Q

oceanography is

A

the scientific study of the worlds oceans

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9
Q

The chemical composition of the earths layers include

A

crust
mantel
core

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10
Q

water found in early earth came from

A

volcanic outgassing

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11
Q

salt in the ocean comes from

A

acidic rain eroding rock material on early earth

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12
Q

oceand cover about___% of earths surface

A

70%

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13
Q

hot spots can produce

A

volcanic island chains

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14
Q

plate boundary where crust is destroyed are called_____

A

convergent

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15
Q

ocean volcanoes undergo___and____which require the fringing coral reef to grow upwards to continues obtaining energy from sunlight as the depth of the volcano increases

A

extinction and eruption

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16
Q

when 2 oceanic plates collide the most important factor determining the subduction is

A

the age, the older colder plate will sink because its more dense

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17
Q

oceanic-oceanic convergence produce:

A

oceanic island arcs and trenches

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18
Q

plate boundaries are commonly associated with

A

earth quakes and volcanic

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19
Q

the continental shelf is

A

a flat plain where sediment is deposited off the edge of the continent, from shore to shelf break

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20
Q

biogenic sediment is predominately made from…

A

calcium carbonate and silica

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21
Q

active continental margins occur

A

close to plate boundaries

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22
Q

sediment cores from the seafloor reveal information about..

A

earths past climate, ocean chemistry, ocean circulation and life

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23
Q

bathymetric is

A

a map that shows the waters depth

24
Q

deepest and flattest part of earth

A

abyssal plains

25
ocean trenches are produced along..
convergent boundarys
26
driving force of plate tectonics are...
earths internal heat
27
the record of earths magnetic field reversing is well preserved in
basaltic rock
28
the 6 continents are
``` north america south america Africa Eurasia Australia Antarctica ```
29
earths physical properties are...
``` lithosphere asthenosphere meosphere outer core inner core ```
30
how did organisms develop ability to create oxygen
photosynthesis
31
three major plate boundaries
divergent convergent transform
32
divergent boundary features
plates move apart new ocean floor created shallow earthquakes
33
convergent boundary feature
``` plates move toward each other oceanic crust destroyed ocean trench volcanic arc deep earthquakes ```
34
three types of convergent boundarys
oceanic-continental oceanic-oceanic continental-continental
35
Oceanic-continental convergence
``` Oceanic plate is subducted – Continental arcs – Explosive andesitic volcanic eruptions ```
36
Oceanic-Oceanic Convergence
Denser plate is subducted • Deep trenches generated • Volcanic island arcs generated
37
continental-continental convergence
No subduction occurs | • Tall mountains uplifted
38
Transform Boundary
sliding motion •no volcanoes •shallow earthquakes
39
what is an Atoll
reefs continue to grow after volcanoes are submerged
40
Three Major Ocean Provinces
continental margins deep ocean basins mid ocean ridge
41
continental margins have 2 types
passive and active
42
Active Continental Margins types
1. Convergent | 2. Transform
43
deep ocean basins have
abyssal plains ocean trenches island arcs
44
mid ocean ridges have
pillow basalts hydrothermal systems Transform faults, fracture zones, and rift valleys
45
sediment cores are...
hollow steel tube collects sediment columns
46
classification by origin | Lithogenous
from rock
47
classification by origin | Biogenous
from life
48
classification by origin | Hydrogenous
from water
49
classification by origin | Cosmogenous:
from space
50
transportation methods
Streams • Wind • Glaciers • Gravity
51
2 types of lithogenic distribution
Neritic (Near shore) deposits | Pelagic (oceanic) deposits
52
biogenous test
shells of microscopic organisms
53
calcite has..
Forams | • coccolithophores
54
silica has..
Diatoms | • Radiolaria
55
2 types of shores
erosion /emergent | deposition/submergent
56
2 major processes in sea level changes
Isostatic | Eustatic