ocean floor

Question 1

why is the ocean salty?

Answer 1

rocks are int the water and rocks have salt in them

Question 2

where does sand come from?

Answer 2

sand comes from broken down rocks

Question 3

what causes tides

?

Answer 3

the moons gravitational pull

Question 4

what causes waves?

Answer 4

wind blowing on the water

Question 5

what is a trench?

Answer 5

an underwater canyon

Question 6

what are the causes of a hot-water heat vent?

Answer 6

it is caused by water seeping into vent and touching a very hot stone

Question 7

part of a contenet that slopes gently away from the shore line.

Answer 7

cont. shelf

Question 8

amount of dissolved salts in the ocean

Answer 8

salinity

Question 9

when cold,dense ocean water sinks

Answer 9

down-welling

Question 10

part of content between cont. shelf and ocean floor

Answer 10

cont. slope

Question 11

when cold water flows at the bottom hits land and flows up to the top.

Answer 11

up-welling

Question 12

a continuous mountain range with a central valley on the ocean floor where two tectonic plates move away from each other

Answer 12

mid-ocean ridge

Question 13

major circulating ocean current

Answer 13

gyre

Question 14

a seamount with a flat top

Answer 14

guyot

Question 15

a stream of water flowing in the ocean

Answer 15

ocean current

Question 16

flat ocean floor covered in sediment

Answer 16

abyssal plain

Question 17

volcanic underwater mountain

Answer 17

seamount

Question 18

a long valley made from the earth’s crust sinking between to parallel faults

Answer 18

rift valley

Question 19

how much of the earth’s surface is water?

Answer 19

70%

Question 20

the order of amount of water largest to smallest.

Answer 20

oceans,glaciers\ice sheets, groundwater,fresh water, water vapor

Question 21

a glacier is

Answer 21

a river of ice\ ice cap

Question 22

what substance do fish need to live and take from the water?

Answer 22

oxygen

Question 23

what is the order of size of oceans largest to smallest?

Answer 23

Pacific,Atlantic,Southern,Arctic and Indian.

Question 24

what is most like a mountain ridge?

Answer 24

mid-ocean ridge