Download Unit 2 Test

Name: ______________________________
Date: ________________
Marine Science
Block: _______
UNIT 2 TEST REVIEW – OCEANS, SEA FLOOR FEATURES, BATHYMETRY &
PLATE TECTONICS
Topics to study:
1. Oceans
a. Major oceans
b. Locations of trenches & MOR
c. Locations of seas
2. Ocean floor features / topography
a. Continental Margin
i. Continental Shelf
ii. Continental Slope
iii. Shelf Break (where shelf & slope meet)
iv. Continental Rise
v. Submarine Canyon
b. Ocean Basin
i. Abyssal Plain
ii. Abyssal Hill
iii. Seamount
iv. Guyot
v. Island
vi. Hot Spots
vii. Trenches
viii. Mid Ocean Ridge (MOR)
ix. Rift Valley
3. Bathymetry – how do we determine the topography of the ocean floor? SONAR
4. Plate Tectonics
a. Continental Drift
i. Alfred Wegener
ii. Theory
iii. Pangaea
iv. Evidence
1. Puzzle-fit of continents
2. Similar rocks, mountains & fossils
v. Why rejected
b. Plate Tectonics
i. Theory
ii. Layers of Earth – core, mantle, crust (composition)
1. Oceanic crust – basalt (dense)
2. Continental crust – granite (less dense)
iii. Lithosphere & asthenosphere (physical characteristics)
iv. How many plates
v. Evidence
1. Location of volcanoes & earthquakes
2. Magnetic patterns
3. Seafloor spreading (seafloor created at MOR, destroyed at trenches)
4. Older rocks away from MOR
5. Hot spot volcano patterns (Hawaiian islands)
vi. Plate boundaries
1. Divergent Oceanic-Oceanic
2. Divergent Continental-Continental
3. Convergent Continental-Continental
4. Convergent Oceanic-Continental or Oceanic-Oceanic (Subduction)
Unit 2 Test – Oceans, Sea Floor Features, Bathymetry & Plate Tectonics
71%
Abyssal Plain
Atlantic Ocean
Basalt
Below Sea Level
Continental Drift
Continental Margin
Continental Rise
Continental Shelf
Continental Slope
Denser
Granite
Guyot
Ice comets & volcanoes
Iceland
Interconnected
Lithosphere
Major Ocean Basins
Mantle
Mid-Ocean Ridge
Near Mid-Ocean Ridges
Oceanic Ridge
Older
Older
On Continents
Pacific Ocean
Recycled
Sea Floor Spreading
Smaller
SONAR
Southern Ocean
Thinner
Trench
Trench
Volcanoes & Earthquakes
Younger
Percent of Earth’s surface covered by water
Smoothest part of the ocean
The ocean that is getting wider
What oceanic crust is made of
How oceanic crust compares to continental crust
Theory that continents were once joined together & broke apart
Submerged part of the continent
Feature at the base of a continent composed of sediments eroded
from the continent
Shallowest part of the continental margin
Steepest part of the continental margin
How oceanic crust compares to continental crust
What continental crust is made of
Large, extinct volcano with a flat top
Origin of the ocean
Where the mid-ocean ridge rises above sea level
Mid-ocean ridges
Crust & upper mantle that “floats” on the asthenosphere
Arctic, Atlantic, Indian, Pacific, Southern
Semi-solid layer of silicon, magnesium & iron, below the crust
Divergent plate boundary
Where youngest seafloor rocks are found
Sea floor is created
How continents compare in age to seafloor
Age of rocks as you move away from a mid-ocean ridge
Where the oldest rock of the planet are found
Largest & deepest ocean
What happens to seafloor at a trench
Occurs at mid-ocean ridges & where new sea floor is created
How continental topography compares to oceanic bathymetry
Technology that sends sound waves that bounce off the ocean
floor to map the ocean’s features
Body of water surrounding Antarctica
How oceanic crust compares to continental crust
Sea floor recycled/destroyed
Occurs when an ocean plate sinks back in to the asthenosphere
Occur at mid-ocean ridges
How oceanic crust compares to continental crust
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