11.1

Question 1

How much of the earth is covered by oceans?

Answer 1

A little over 2 thirds

Question 2

What are the 5 major oceans labeled biggest to smallest?

Answer 2

Pacific Atlantic Indian southern Arctic

Question 3

What are the low points on earths surface called?

Answer 3

Basins

Question 4

What are oceans?

Answer 4

Basins into which water has flowed and accumulated

Question 5

What are oceans so important

Answer 5

Controls earth temperature, making the planet liveable; they create the weather patterns; and they are the source of the water that falls as fresh water on land, supporting all life forms

Question 6

How long have oceans been on earth

Answer 6

Scientists believe about 3 billion years

Question 7

How long ago did the planet form?

Answer 7

4.5 billion years ago

Question 8

How did oceans form?

Answer 8

Earth Started out as a hot ball of molten rock. The outside of the earth gradually cooled, but heat continued to be released deep within the planet by volcanoes. Water trapped inside the volcanic materials was also released into the atmosphere as water vapour. As the water vapour cooled and condensed, it fell to earths surface as precipitation. The water started collecting in the lowest parts of earth surface, ocean basins

Question 9

What’s another way oceans formed?

Answer 9

Came from the ice on comets that hit the young earth

Question 10

What are 5 features on land taht are also in the ocean?

Answer 10

Mountain ranges, valleys, flat plains, canyons, volcanoes

Question 11

What are the oceans 2 distinct parts called?

Answer 11

Ocean basins and continental margins

Question 12

Ocean basins?

Answer 12

The large middle part of the ocean

Question 13

Continental margins?

Answer 13

Rising outside edges of the ocean

Question 14

What do storm waters do?

Answer 14

Erode coral reefs

Question 15

What do icebergs do on the ocean?

Answer 15

Gouge deep grooves in the ocean floor

Question 16

What’s the greatest in shaping the ocean floor?

Answer 16

Tectonic processes

Question 17

What is the entire surface of the earth made of?

Answer 17

Large sections of rock called tectonic plates

Question 18

What do tectonic plates lay on top of

Answer 18

Float over a layer of molten rock called magma

Question 19

How do two plates push apart

Answer 19

When the magma heats up it rises

Question 20

What are the two type of tectonic plates?

Answer 20

Oceanic and continental

Question 21

Are oceanic of continental plates denser?

Answer 21

Oceanic

Question 22

Oceanic plates?

Answer 22

They lie under oceans

Question 23

Continental plates?

Answer 23

Lie under continent

Question 24

What happens when two plates r pushed apart? What does this create?

Answer 24

The underlying magma oozes up into the empty spaces which creates a mid one a ridge

Question 25

What is the largest example of a mid ocean ridge and where is this found?

Answer 25

Mid Atlantic ridge in the Atlantic Ocean

Question 26

What two continents have been getting pushed about and for how long from the mid Atlantic ridge?

Answer 26

North America and Europe for the last 200 million years

Question 27

What happens when the magma cools after creating a mid ocean ridge?

Answer 27

It becomes the newest Rock on the planet

Question 28

What does the rising no hardening of magma cause?

Answer 28

Forces the plates to continually move apart, making the ocean for grow wider and wider

Question 29

How fast do the oceans grow per year?

Answer 29

2.5cm

Question 30

What is subduction? And what does it form?

Answer 30

When an Oceanic plate Comes in contact with a continental plate and the denser oceanic plate is forced to slip underneath the continental Plate. This forms a trench

Question 31

Trench?

Answer 31

A long v shaped groove that marks the boundary between an oceanic plate and a continental plate

Question 32

Where do trenches develop?

Answer 32

Near the outer edges of the ocean

Question 33

Where do mid ovens ridges develop?

Answer 33

Middle of ocean basins

Question 34

abyssal plains?

Answer 34

Wide flat areas Stretching between the areas of trenches and mid ocean ridges

Question 35

What percent do abyssal plains make up in the Pacific ocean?

Answer 35

75%

Question 36

What percent do abyssal plains make up of the Atlantic ocean?

Answer 36

30%

Question 37

Seamount?

Answer 37

An old Inactive volcano that once developed near a mid ocean ridge, but have been shifted away as the plates move apart

Question 38

Continental margins?

Answer 38

Regins of the ocean floor that lie underwater on the edge of the continents

Question 39

Continental shelf?

Answer 39

A flat area that extends from the continents floor line to the ocean basin

Question 40

Continental slope?

Answer 40

A steep area that drops off rapidly to the ocean basin from the edge of the continental shelf

Question 41

The depth of continental shelf ranges..

Answer 41

30m to 600m

Question 42

What is the average width of continental shelves?

Answer 42

480 km wide

Question 43

What happened during the last ice age?

Answer 43

Continental shelves in the northern hemisphere were not underwater. As more ocean water became locked up as ice, The water level fell, leaving the shelf exposed

Question 44

How are sediments carried into the ocean?

Answer 44

By rivers flowing off the continent

Question 45

How is turbidity current caused?

Answer 45

The sediments build up along The steep continental slope. When the build up becomes too great, gravity suddenly causes the build up to give away

Question 46

Continental rise?where is it

Answer 46

Gently sloping piles of sediment. Between the continental slope and the abyssal plains.

Question 47

Submarine canyons?

Answer 47

Steep sided valley cut into the sea floor of the continental slope

Question 48

Where else are submarine canyons found?

Answer 48

Regions where large rivers reach the ocean

Question 49

What is the result when a living organism dies in the ocean?

Answer 49

A thick layer of material on the ocean floor made of these biological sediments, particles produced from the remains of a living substance

Question 50

When an organism dies in the ocean, what chemically reacts in the water?

Answer 50

Shells, teeth, skeleton, and scales