The largest ocean in the world is:
A a) Indian Ocean
B b) Atlantic Ocean
C c) Pacific Ocean
D d) Arctic Ocean
The Sargasso Sea is located in:
A a) Indian Ocean
B b) Atlantic Ocean
C c) Pacific Ocean
D d) Arctic Ocean
The movement of ocean water due to wind is called:
A a) Waves
B b) Currents
C c) Tides
D d) Drift
The Gulf Stream is a:
A a) Cold current
B b) Warm current
C c) Seasonal current
D d) Periodic current
Tides are caused by:
A a) Sun’s rotation
B b) Earth’s rotation
C c) Gravitational pull of Moon and Sun
D d) Ocean currents
The deepest part of the ocean is:
A a) Tonga Trench
B b) Mariana Trench
C c) Java Trench
D d) Puerto Rico Trench
Salinity is highest in:
A a) Polar regions
B b) Equatorial regions
C c) Subtropical regions
D d) Deep sea
The ocean floor is mainly composed of:
A a) Granite
B b) Basalt
C c) Sandstone
D d) Shale
Which current affects the climate of Western Europe?
A a) Canary Current
B b) Gulf Stream
C c) Labrador Current
D d) Kuroshio Current
Upwelling zones are rich in:
A a) Nutrients
B b) Salt
C c) Sediments
D d) Coral
The vertical movement of ocean water is called:
A a) Drift
B b) Upwelling
C c) Mixing
D d) Circulation
Coral reefs develop best in:
A a) Cold shallow waters
B b) Warm shallow waters
C c) Deep oceanic waters
D d) Brackish waters
The average salinity of ocean water is:
A a) 1%
B b) 3.5%
C c) 5%
D d) 10%
Which ocean current is known as the ‘Japan Current’?
A a) Oyashio Current
B b) Kuroshio Current
C c) Humboldt Current
D d) Peru Current
Ocean currents in the Northern Hemisphere move:
A a) Clockwise
B b) Anticlockwise
C c) Randomly
D d) Vertically