Which of the following is a large ocean wave that is caused by sudden motion on the ocean floor which could be in the form of an earthquake, volcanic eruption or an underwater landslide?

The imaginary lines on maps joining the places having equal temperatures are known as

A narrow strip of water joining two large bodies of sea water is called:

Name the imaginary line passing round the earth midway between the North and South Poles.

Only continent which is crossed by equator, tropic of cancer and tropic of Capricorn

Among the following present day continents which one was not a part of the Gondwanaland the ancestral supercontinent?