Draw a well labelled diagram showing the formation of spring and neap tides.

Describe the two types of ocean currents based on their temperature.

Give a reason for each of the following:

(i) Warm currents produce a milder climate.

(ii) The eastern coasts of USA are comparatively cold.

(iii) The coasts of Norway are not frozen in winter whereas its adjoining coasts are frozen for most parts of the year.

Describe one effect of each of the following three ocean currents.

(i) Labrador Current of the Atlantic Ocean.

(ii) The Kuroshio current

(iii) Oyashio Current of the Pacific Ocean.