The Sunda Trench lies in the______ ocean.

(a)

Atlantic

(b)

Pacific

(c)

Indian

(d)

Antarctic

The oceanic ridge comes into existence due to

(a)

convergence of tectonic plates

(b)

divergence of tectonic plates

(c)

lateral movements of plates

(d)

stearing of plates

Which of the following is not correctly matched?

(a)

Gulf Stream - Pacific Ocean

(b)

Labrador current - North Atlantic Ocean

(c)

Canary current - Mediterranean sea

(d)

Mozambique current - Indian Ocean

The deepest point in the Arctic ocean is___________

(a)

Java Trench

(b)

Fram basin

(c)

Puerto Rico

(d)

South Sandwich Trench

The height of the waves depends on________

(a)

speed of wind

(b)

Its duration

(c)

the direction

(d)

All of the above

A very long narrow depression on the ocean floor is called

(a)

Guyot

(b)

Ridge

(c)

Trench

(d)

atoll

Mention the four spheres of the earth.

Why is earth called a Blue planet?

Explain the term a) Water Table b) Aquifers

Explain the terms a) Isobath b) Isohaline

Mariana trench

(1)

Atlantic Ocean

Sargasso sea

(2)

Second order landform

Heavy rains

(3)

Decreases salinity in the oceans

Continental slope

(4)

Deepest point in the Pacific

Green land

(5)

North Atlantic Ocean

Spring tide and Neap tide.

Tidal power and Hydel power.

Assertion (A): Oceans are always shown in blue in maps.
Reason(R): It indicates the natural colour of the oceans.
A) both A and R are correct and R explains A.
B) both A and R are correct but R does not explain A.
C) A is correct but R is false.

Assertion (A):Atolls are more common in the Atlantic ocean.
Reason(R):The marine population at the depth is less.
A) both A and R are correct and R explains A.
B) both A and R are correct but R does not explain A.
C) A is correct but R is false.

Explain the influences of the marine resources on mankind.

The oceans are salty. Why?

The northern hemisphere and the southern hemisphere are called land and water hemispheres respectively.

The ocean waters are saline in nature

Continental shelf provides good fishing ground.

Salinity of Bay of Bengal is greater than the Arabian sea

What is hydrological cycle?

What are the factors that generate the ocean currents?

What do you mean by the ocean salinity?