Give reason why ocean water is salty class 7?

The oceans contain about 5.1% of the water on the earth’s surface. Of this water, about 70% is salty ocean water. The remaining 30% is freshwater. The average salinity of ocean water is about 35 grams per liter. There are three types of salt in the oceans: Sodium (Ex. NaCl or table salt), calcium and magnesium.

Explain ocean water is salty class 7?

The amount of salt in the world’s oceans is equivalent to a lump of ice about the size of the earth’s continents. If you were to take all the salt in the oceans and pile it onto the earth, it would create a layer that is 6 miles high. The salt content of ocean water is about 1.5% and is about the same in all oceans of the world.

Why is water in deep ocean salty?

We know that water is salty because it has a high concentration of dissolved salts. These salts help the ocean to remain a liquid at temperatures below freezing, which is important for sustaining life here on earth. The salty water that covers most of the ocean is quite deep, so the water is salty on the surface because it has been there for a long time. In general, the deeper you go down in the ocean, the saltier it gets—it’s harder for the water to rise up

Explain why ocean water is salty class 7 answers?

Ocean water is salty because it absorbs salt from the soil on which plants grow. This process is called de-salination. Rainwater is also salty, but rainwater flows from the mountains to the ocean. The water in the ocean is salty because it absorbs the salty water of rivers, lakes and groundwater.

Why is water in the ocean salty?

The oceans contain an enormous amount of salt. A large portion of this salt is dissolved in seawater. The water is salty because the salts are chemically bound to the water. The more dissolved salts a body of water has, the more salty it is. The density of salt in seawater is about five times that of freshwater.