Give reasons:
(a) Ocean water is salty.
(b) The quality of water is deteriorating.
(a) The water of the oceans is salty as it contains large amount of dissolved salts.
(b) Water is being used injudiciously. Whatever potable water is available, its quality is not good. It is because industrial effluents and untreated water of industries get mixed into streams and rivers. Swerage water also gets mixed into these water bodies. As a result, the quality of water is deteriorating day by day.
Answer the following questions briefly.
(a) What is precipitation?
(b) What is water cycle?
(c) What are the factors affecting the height of the waves?
(d) Which factors affect the movement of ocean water?
(e) What are tides and how are they caused?
(f) What are ocean currents?
For Fun
Be a Detective
1. The name of one river is hidden in each of the sentences below. Spot it. Example: Mandira, Vijayalakshmi and Surinder are my best friends