Balbharati Solutions Class 9 Geography The Properties of Sea Water
Welcome to NCTB Solutions. Here with this post we are going to help 9th class students for the Solutions of Balbharati Class 9 Geography Text Book Chapter 6, The Properties of Sea Water. Here students can easily find step by step solutions of all the questions in The Properties of Sea Water. Also our Expert Geography Teacher’s solved all the question answer with easily understandable language with proper guidance so that all the students can understand easily. Here in this post students will get chapter 6 solutions. Here all the Question Answer are based on Balbharati latest syllabus. Here all the question and answer are based on Maharashtra State Board latest syllabus.
The Properties of Sea Water Exercise question Solutions :
Question no – (1)
(a) Slanting sunrays, melting snow
(b) Cloudy sky, rainfall throughout the year
(c) Clear skies for the most part, perpendicular sunrays
(d) Less supply of freshwater, desert area around
(e) Low temperatures, ample supply of river water
(f) Continental location, desert around, low rainfall
Question no – (2)
(a) Salinity is low in the land-locked Baltic Sea.
Salinity is low in the land-locked Baltic Sea because of higher temperature. The salt density is also low because the fresh water from the surrounding land gets run off.
(b) There is higher salinity in the northern Red Sea while lower in the southern.
The water from the Gulf of Suez is known to have a salinity of about 40 parts per thousand and the Gulf of Suez is on the northern part of Red Sea. This is the reason of higher salinity in the northern Red Sea while lower in the southern.
(c) Oceans located at the same latitude do not have same salinity.
Oceans located at the same latitude do not have the same salinity because it depends on the factors like evaporation and supply of fresh water ratio, where supply of freshwater exceeds the rate of evaporation, salinity is low and where rate of evaporation is more then the supply of fresh water there the salinity is higher and where supply of fresh water and evaporation of water is low on these areas salinity is not affected that much.
(d) With increasing depth, the temperature of sea water decreases to a certain limit.
With increasing depth, the temperature of seawater decreases to a certain limit because the sunlight can’t reach at the depth of sea water.
(e) There are more salt-pans on the Western coast of India than its eastern coast
There are more salinity on the western coast of India than its eastern coast because Bay of Bengal lies on the east of India and Arabian Sea lies on the west. Many large rivers drain their waters in the Bay of Bengal, due to this supply of fresh water the salinity of the eastern coast of India is lower then western coast, and because no major river drain their water on the Arabian Sea, the supply of freshwater is low and the evaporation is high, due to this ratio salinity of the west coast of India is higher.
(f) Salinity increases in the mid-latitudinal zones.
In mid-latitudinal zones (25° to 35° North and South), rainfall is less and the supply of freshwater from rivers is also low. This zone has the hot deserts of the world. Thus, the salinity increases in the mid-latitudinal zones.
Question no – (3)
(a) What are the factors affecting the salinity of the sea water?
The supply of freshwater, the temperature of that region, the formation of sea ice and the evaporation of sea water are the factors which affecting the salinity of sea water.
(b) Explain the distribution of salinity around the Tropic of Cancer and tropic of Capricorn.
The distribution of salinity around the Tropic of Cancer and the Tropic of Capricorn is higher and the rate of evaporation is higher, because the uneven supply of freshwater and the uneven temperature on earth. The region between the Tropic of Cancer and the Tropic of Capricorn is called tropical zone, in this zone the temperature is higher.
(c) What are the factors affecting the temperature of the sea water?
The temperature of the sea water affecting upon many factors like the average temperature in polar areas is around 2°C while 25°C near equators. The surface temperature of the seawater decreases from the equatorial areas towards the poles, latitudinally.
(d) Explain the changes occurring in the temperature of sea water according to the depth.
As we go deep in the sea, the temperature falls with the depth because the sunlight constantly decreases with the depth of the sea.
(e) Name the factors affecting salinity.
The factors affecting salinity are the supply of freshwater, the rate of evaporation, the temperature of the region and the depth of the sea water.
Question no – (4)
(a) The density of sea water : The increasing temperature decreases the density of sea water, sea water gets more dense as the temperature goes down. More dense water floats below the less dense water.
(b) The salinity of sea water : Because of temperature if the salinity of water is low, the density of water decreases and if the salinity of water is high than the density of water increases.
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