Water and its importance Worksheet-11

Water and its importance Worksheet-11

1. Match the Following:

Crossword:

2. A disease affecting thousands of people at the same time.
3. A structure built on a river to store and hold back water.
4. Water of the sea and oceans that have a lot of salt making it unfit for drinking and irrigation.
5. A condition when ground becomes submerged under water, due to heavy rain and overflowing of rivers.
6. Method of watering crops by artificial means.
7. Water fit for human consumption.
8. The cyclic movement of water from the atmosphere to the Earth and back to the atmosphere through various processes.
9. The release of water vapour into the atmosphere through the leaves of plants.
10. Lack of food in a region for a long period.
11. Abnormally long period of insufficient or no rainfall.
12. Water found in rivers, lakes, and ponds used for domestic and commercial purposes.
13. The process in which sun's heat changes the water in oceans, rivers, ponds, and other water bodies into water vapour.
14. The process in which some rainwater seeps into the ground, forming ground water.
15. Water vapour rises up and condenses on dust particles to form clouds in this process.
16. The process in which plants give off water vapour through their leaves.
17. Water stored in clouds reaches Earth in the form of rain, snow, etc. and gets collected in this form.

Sequencing:

Arrange the steps in a sequenced manner

1. As the air rises, it begins to cool.
2. The water vapour condenses on dust particles present in the atmosphere to form millions of tiny droplets.
3. This makes the air lighter and it rises in the atmosphere, taking water vapour with it.
4. The cluster of tiny water droplets floating in air forms cloud.
5. When the temperature of air increases, it expands.

Fill in the Blanks:

1. Lack of food in a region for a long period is called _______.
2. A widespread occurrence of an infectious disease in a community at a particular time is called_________.
3. Most of the water (about 97%) is in the sea and oceans as _______ water.
4. Only a tiny fraction about ________% of the Earth's water is available to us as fresh water.
5. Almost ________% of human body weight is due to water present in the tissues.
6. The conversion of a liquid to its vapour is called ________.
7. The conversion of the vapour of a substance to its liquid form is called ___.
8. Trees help in the process of water cycle through ______. (name the process)
9. The abnormally long period of insufficient or no rainfall is called ________.
10. A structure built to hold backwater in order to prevent flooding, and to provide water for irrigation and storage is called ________.

Answer:

1. 1-c, 2-d, 3-a, 4-b, 5-e
2. Epidemic
3. Dam
4. Salt water
5. Flood
6. Irrigation
7. Potable water
8. Water cycle
9. Transpiration
10. Famine
11. Drought
12. Fresh water
13. Evaporation
14. Collection
15. Condensation
16. Transpiration
17. Precipitation

Sequencing:

1. When the temperature of air increases, it expands.
2. This makes the air lighter and it rises in the atmosphere, taking water vapour with it.
3. As the air rises, it begins to cool.
4. The water vapour condenses on dust particles present in the atmosphere to form millions of tiny droplets.
5. The cluster of tiny water droplets floating in air forms cloud.

Fill in the Blanks:

1. Famine
2. Epidemic
3. Salt
4. 3/three
5. 70
6. Evaporation
7. Condensation
8. Transpiration
9. Drought
10. Dam