T3 CH2 Water Science - T3 CH2 Water

………. are wetlands where water bodies meet the sea.

Water from oceans, lakes, ponds, and rivers evaporates due to the heat of _______

Which one is not an example of groundwater?

_______ is a transparent, tasteless, odourless, chemical substance.

If the total water on earth be 100% the percentage of freshwater is ………..

Water cycle is also called as ______.

Water levels in rivers increase greatly during ______.

______ is built on rivers to regulate water flow and distribute water.

The process of changing water into its vapour is called ______.

Only ______ percent of natural water is available for human consumption.

Sea water can be used for irrigation as such.

Condensation results in the formation of dew on grass.

The evaporation of water takes place only in sunlight.

Seas are formed when the water table meets the land surface.

Water present in rivers, lakes, and ponds is unfit for use by human beings.

Name the places where water is found as ice.

Analogy
Ground water : ______ :: Surface-water : lakes

Analogy
Population explosion : Water scarcity :: Recycle : ______

Solid State : ………… : : Gaseous State : Vapour

Filtering : Sand : : ………….. : Ammonia

To clean the spectacles, people often breathe out on glasses to make them wet. Explain why do the glasses become wet.

When there is no pond or lake in an area, will there be formation of clouds possible in that area?

The fresh water available on earth is only 3%. We cannot increase the amount of water. In that case, how can sustain the water level?

Give reason for the following statement – Sewage should not be disposed of in rivers or oceans before treatment.

About 71% of the earth’s surface is covered with water, then why do we face scarcity of water?

CROSSWORD
DOWN
1. A method of water conservation.
2. Process of getting water vapour from sea water.
6. Water stored in dams is used for the generation of ______.
ACROSS
3. is a large body of non-potable water found in nature.
4. In summer, the body loses water as ______.
5. Plants undergo ______ and contribute to the water cycle.

Look at the map of Tamilnadu showing annual rainfall and answer the questions given below

1. Identify the districts that get only low annual rainfall in Tamilnadu.
2. Identify the districts that get a medium annual rainfall in Tamilnadu.
3. State the districts that enjoy high annual rainfall in Tamilnadu.

Arrange the following statements in the correct sequence

1. These vapours condense to form tiny droplets of water.
2. The water droplets come together to form large water droplets.
3. The heat of the sun causes the evaporation of water from the surface of the earth, oceans, lakes, rivers, and other water bodies.
4. The large water droplets become heavy and the air cannot hold them, therefore, they fall as rain.
5. Water vapour is also continuously added to the atmosphere through transpiration from the surface of the leaves of trees.
6. Warm air carrying clouds rises up.
7. Higher up in the atmosphere, the air is cool.
8. These droplets floating in the air along with the dust particles form clouds.

Who is known as the waterman of India? Browse the net and find the details about the award, the waterman received for water management. State the findings by drafting a report.