Tsunamis are caused by

(1) mixing of cold and warm currents

(2) earthquakes

(3) changes in sea level

(4) volcanic eruption

Seismic sea waves which approach the coasts at greater force are known as

(1) Tides

(2) Tsunami

(3) Current

(4) Cyclone

Which of the following is a cold ocean current?

(1) Humboldt current

(2) Brazil current

(3) Oyashio current

(4) Canary current

The sea breeze is formed during

(1) Day time

(2) Night time

(3) Both

(4) Seasonal

The coral reefs are the marine counterparts of

(1) Temperate forests

(2) Tropical rain forests

(3) Savannahs

(4) Scrubland

The deepest ocean is-

(1) the Arctic

(2) Pacific

(3) Atlantic

(4) Indian

Two seas or water-bodies connected by a narrow stretch of water is known as a

(1)

Bay

(2) Strait

(3) Peninsula

(4) Isthmus

Waves approaching the shore is known as

(1) Swash

(2) Tsunami

(3) Currents

(4) Tide

Atoll is a kind of

(1) sand-dune

(2) lake

(3) sandbar

(4) inland sea

The coastal part of water bodies of the oceans which is structurally part of the mainland of the continents is called the

(1) Isthmus

(2) Oceanic ridge

(3) Continental shelf

(4) Continental slope

Which one of the following is not a cold ocean current?

(1) California

(2) Oyashio

(3) Kuroshio

(4) Canaries