The temperature of the ocean waters generally_________ at greater depth.

(a)

increases

(b)

decreases

(c)

remains constant

(d)

none of the above

Ocean currents are produced due to________

(a)

due to rotation of earth

(b)

due to variation in temperature

(c)

due to earth's movement

(d)

all the above

Consider the following statements.
1. Most of the fishing grounds occur in areas where the continental shelf is wide.
2. Fishing is well developed in warm tropical waters.
3. Mixing of warm and cold currents facilitates plant nutrients for fish.
4. Inland fishing became significant in India.

(a)

1 and 2 are correct

(b)

1 and 3 are correct

(c)

2,3 and 4 are correct

(d)

1,2 and 3 are correct

Which of the following indicates the correct sequence of the topography beneath the surface of the sea?

(a)

Continental shelf-Continental slope-Sea plain-Sea trench

(b)

Continental slope-Continental shelf-Sea plain-Sea trench.

(c)

Sea plain-Continental slope-Continental shelf-Sea trench.

(d)

Continental slope-Sea plain-Continental shelf-Sea trench.

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