Hydrosphere

Hydrosphere

Characteristics

Characteristics of the hydrosphere

• 70% of the earth's surface is covered by ocean.

• The largest part of the hydrosphere is formed by salt walter in the ocean.

• Water is divided in three states: solid, liquid, and gas.

Distribution of water in our planet

Multiple Choice

Where is 97% of the Earth's water located?

• Rivers and Lakes

• Glaciers and Icecaps

• oceans

• groundwater

Fresh water

• Only 3% of the total water on earth is fresh water, which has little salt.

• Most of it is in solid form as ice, so very little is available for humans and living things to use.

Multiple Choice

How much of the earth's water is freshwater?

• 50 %

• 3 %

• 97 %

• 93 %

Multiple Choice

What is NOT an example of freshwater?

• Rivers
• Lakes
• Oceans
• Groundwater

Multiple Choice

Why is freshwater important?

• So we can have lakes and Rivers
• There is no such thing as freshwater.
• We need it to survive.

Multiple Choice

Why is MOST of the freshwater on Earth ^NOT available for our use?

• All freshwater on Earth is easily accessible for use.

• It is frozen in the icecaps and glaciers.

• It is surface water.

• It is underground.

The importance of the hydrosphere for life and obtaining natural resources

Water is important for organisms

Water is important for organisms

Water is the origin od the first form of life.

Water is the habitat of many organisms.

Water makes up the larges part of the bodies of living things.

Open Ended

Why is water so important?

Open your Science book on p. 119 and read the information.

Uses of water

Water can be used in a number of ways.

Energy

the movement of water can be use to create electric energy, as occurs at hydroelectric dams and in power plants that use tidal movements.

Industrial processes

the quality of water depends on what it is used for -for example, the water used in food industry is of higher quality than the water used for mining.

Agroforesty activities

We need 4,500 liters of water to process 300 grams of meat, 1,300 liters to process 1 kilogram of flour, 1,700 liter to process a kilogram of rice and 50 liters to process an orange.

Open Ended

Mention two activities where you use water at home.

Open Ended

Mention two industries that use water.

Open Ended

Mention two ways organisms use water.