Samacheer Kalvi solutions for Science - Term 3 [English] Class 6 TN Board chapter 2 - Water [Latest edition]

Around 97% of water available on earth is ______ water.

Which of the following is not a part of water cycle?

Which of the following processes add water vapour to the atmosphere?

1. Transpiration
2. Precipitation
3. Condensation
4. Evaporation

About 30% of the fresh water is found in?

Using R.O. (Reverse Osmosis) plant at home eliminates lot of non-potable water. The best way to effectively use the expelled water of R.O. plant is ______.

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

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

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

Water levels in rivers increase greatly during ______.

Water cycle is also called as ______.

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

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

The evaporation of water takes place only in sunlight.

Condensation results in the formation of dew on grass.

Sea water can be used for irrigation as such.

Match the following

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.

Analogy

Population explosion : Water scarcity :: Recycle : ______

Analogy

Ground water : ______ :: Surface-water : lakes

Write down the sources of water.

How do people in cities and rural areas get water for various purposes?

Take out the cooled bottle of water from the refrigerator and keep it on a table. After some time you notice a puddle of water around it. Why?

We could see clouds almost every day. Why doesn’t it rain daily?

Name the places where water is found as ice.

How do aquatic animals manage to live in Arctic and Antarctic Circle?

What are the types of rainwater harvesting?

Differentiate between surface water and ground water.

Write a few slogans of your own on the topic “Save Water”

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

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

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?

What is potable water? List four characteristics of potable water.

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.

What is rainwater harvesting? Explain in a few sentences how it can be used in houses.

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

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

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.

Observe the given graph carefully and answer the questions.

1. What percentage of water is seen in fish?
2. Name the food item that has maximum amount of water in its content.
3. Name the food item that has minimum amount of water in its content.
4. Human body consists of about ______ percentage of water.
5. Specify the food item that can be consumed by a person when he/she is suffering from dehydration.

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.