Oceanography (final)

Question 1

HMS Challenger

Answer 1

The voyage that birthed oceanography

Question 2

Oceanography

Answer 2

The scientific study of the oceans

Question 3

Bathymetry

Answer 3

Measurement of ocean depths and the charting of the shape of the ocean floor
Historically - Measurements made with a line
Today - Sonar is used in bathometric measurements

Question 4

Continental margin

Answer 4

The region of transition from the land to the deep seafloor, i.e. between continental and oceanic crust

Question 5

Passive continental margins

Answer 5

Tectonically inactive (still can be dynamic)
Far from plate boundary
Nearly entire Atlantic Ocean and large portion of Indian Ocean

Question 6

Active continental margins

Answer 6

Tectonically active
At plate boundary

Question 7

Accretionary wedges

Answer 7

Develop along subduction zone
Sediment from ocean floor are scraped from descending ocean plate
Scraped off sediment pressed against edge of overriding plate

Question 8

Subduction erosion

Answer 8

Sediment and rock scraped off bottom of overriding plate
Carried into mantle by subducting plate

Question 9

Deep ocean trenches

Answer 9

Long narrow troughs
Deepest parts of the ocean
Most occur in the Pacific - Ring of Fire
Sites of plate convergence where oceanic lithosphere subduct back into the mantle