PP1 - Introduction to our ocean planet

Question 1

What is oceanography?

Answer 1

The act of recording and measuring the oceans

Question 2

What is true of the earth’s core’s interior structure?

Answer 2

– 3500km
–Solid inner
– Molten outer
– Very dense
– Fe, Ni

Question 3

What is true of the earth’s mantle’s interior structure?

Answer 3

~2900km
– Dense
– Hot rocks
– Mg, Si, Fe, O

Question 4

What is true of the earth’s crust’s interior structure?

Answer 4

30-50KM
– Low density
– Al, Si, O

Question 5

What are the 3 exterior ‘spheres’?

Answer 5

Hydrosphere, biosphere, atmosphere

Question 6

What percentage of the earth’s surface is ocean basins?

Answer 6

71%

Question 7

What is the mean depth of ocean basins?

Answer 7

3.8km

Question 8

What does the lithosphere consist of? What is true of it?

Answer 8

Crust, upper mantle

Brittle

Question 9

What is true of the mesosphere?

Answer 9

Below 350km

More rigid

Question 10

What is true of shelfs in continental margins?

Answer 10

Nearly flat, 1-1000km wide, ~0.5° slope

Question 11

What is true of slopes in continental margins?

Answer 11

~4° slope to 2-3km depth, submarine canyons

Question 12

What is true of shelf breaks in continental margins?

Answer 12

~130m depth, 1-4°

Question 13

What is true of rises in continental margins?

Answer 13

~1° slope to ~500km offshore and ~4km depth

Question 14

What is true of deep-sea trenches?

Answer 14

Long narrow depressions, 3-5km deep, seismic

Question 15

What is true of abyssal plains in deep ocean basins?

Answer 15

3-5km depth, land-derived sediment 100-100m thick

Question 16

When is water most dense?

Answer 16

3.98°C

Question 17

What is true of seawater’s freezing point?

Answer 17

It has a lower freezing point than put water

Question 18

What does pure water boil at?

Answer 18

373K

Question 19

What does pure water freeze at?

Answer 19

273K