Ocean

Question 1

Ocean Salt

Answer 1

3.5% Salt,
Mostly Sodium Chloride,
Come from rocks, run off carries the salts to the ocean
16000 times greater than fresh water

Question 2

Salinity

Answer 2

The amount of dissolved salts in water

Question 3

Volcanoes underwater

Answer 3

Add sulphur into the water when they erupt

Question 4

Ocean basins

Answer 4

Largest ecosystem on earth

Includes Abyssal Plains, trenches, and ridges

Question 5

Ridge

Answer 5

A long undersea mountain range that runs in the middle of the oceans
Formed by diverging plates, magma spews out

Question 6

Trench

Answer 6

Narrow, steep sided canyons

Formed when a light oceanic plate is pushed under a heavy continental plate

Question 7

Abyssal Plains

Answer 7

Wide, flat open land
Formed by sediment deposits
Sediment is carried in underwater landslides, and spread out by currents

Question 8

Continental Shelf

Answer 8

Area between the coast and edge of the ocean basin
Submerged part of the continent
Extends 300km out to sea
About 1 km deep

Question 9

Continental Slope

Answer 9

The edge of the shelf, plunges 3 km down