TS 6th Class Science Guide 3rd Lesson Rain: Where Does it Come From?

TS Board Telangana SCERT Class 6 Science Solutions 3rd Lesson Rain: Where Does it Come From? Textbook Questions and Answers.

TS 6th Class Science 3rd Lesson Questions and Answers Telangana – Rain: Where Does it Come From?

Question 1.
How are clouds formed ? Explain.
Answer:

• On a sunny day, the sun heats up the ground as well as the water in seas, oceans, rivers, ponds etc. This water converts into water vapour by the process of evaporation.
• Evaporation is the process of water changing into water vapour.
• Evaporation is a natural process which takes place on the earth.
• Water evaporates continuously from the surfaces of water bodies like seas, oceans, rivers, ponds etc., and changes into water vapour due to the heat supplied by sunlight.
• The water vapour entered into air through the process of evaporation forms clouds in the sky.

Question 2.
How does the rain water reach from clouds to rivers or oceans ?
(Or)
Describe the relationship between oceans and rains.
Answer:

• The water in the water bodies gets heated up and converts into water vapour by the process of evaporation.
• When water vapour reaches higher levels it condenses due to contact with cool air and forms water droplets.
• These droplets remain floating in air at higher levels of the atmosphere and appear as clouds.

Question 3.
When do clouds become cool ?
(Or)
Explain the changes that take place in clouds before it rain.
(Or)
How do you imagine that it is likely to rain ?
(Or)
Water vapour converts into clouds. How clouds turn into rain ?
(Or)
Krishnaveni said, “The raining takes place from clouds”. What are the observations you make at the time of raining?
Answer:

• Winds bring the clouds from the sea to the land. Clouds are nothing but evaporated water.
• The colder air in the upper layers of the atmosphere cools the clouds.
• The clouds moving in air are generally at higher levels.
• Sometimes the cool breeze coming along with air makes the clouds cooler.
• These cool clouds bring rain.

Question 4.
Explain the relationship between the heat of sun and evaporation.
Answer:

• On a warm day, the sun heats the ground as well as the water in the water bodies.
• This water converts into water vapour by the process of evaporation.
• More the sun heats up the water from water bodies, the more evaporation of water occurs.
• The formation of clouds depends on the amount of water that evaporates due to sun heat.

Question 5.
Why do we experience cloud like smoke near our mouth while we speak during the winter season?Answer:

• In winter, the air in our atmosphere is very cool as compared to the air coming out from our mouth.
• Water vapour present in the air coming out from our mouth gets cooled suddenly to form very tiny droplets.
• These tiny droplets concentrated in a limited area, appear like smoke or a small cloud near our mouth.

Question 6.
Correct the given sentence if necessary.
“If the size of water drops decreases in the clouds, they can no longer hold the water drops.”
Answer:

• The given sentence is not applicable for the characteristic feature of the appearance of the clouds.
• When water vapour reaches higher levels it condenses due to contact with cool air and forms small drops or water droplets.
• These tiny droplets remain floating in air at higher levels of the atmosphere and appear as clouds.
• Therefore if the size of water drops decreases in the clouds, they can hold water drops.

Question 7.
Which of the following days is more suitable for drying of washed clothes? Explain why.
a. Windy day b. Cloudy day
Answer:

• Windy day is more suitable than the cloudy day for drying of washed clothes.
• The rate of evaporation increases with the wind flow.
• Cloudy atmosphere has less capacity of evaporating water into vapour than windy atmosphere. The evaporation will be slow.
• Clothes dry faster in windy atmosphere, and slower in cloudy regions.

Question 8.
Which of the following statements are right (Or) wrong?
a. Evaporation takes place quickly when more heat is supplied.
b. For condensation of water vapour, it should be cooled.
c. Water vapour is obtained from water by its evaporation.
Answer:
The three given statements are true to their nature.
a. Evaporation takes place quickly when more heat is supplied.
b. When water vapour gets cooled, it turns into water. Cool air converts water vapour into water droplets which in turn finally into water by the process of condensation.
c. The process of changing of water into water vapour is called evaporation.

Question 9.
Draw a diagram to explain the water cycle.
Answer:

Question 10.
How do you feel when you see the beauty of Rainbow ? Express your feelings In the form of a song or a poem.
Answer:
1. The Rainbow formation during rainy season is a natural phenomenon in the sky.
2. The refractive index of the light through tiny droplets of rain after rain fall designs the rainbow.
3. The rainbow is the seven coloured structure of visible light rays of electro magnetic radiation.
4. It possesses Violet, Indigo, Blue, Green, Yellow, Orange and Red colours which are embedded in visible light.
5. The beauty of rainbow is beyond our imagination.
My feelings on rainbow are as follows:
The beauty of seven colours of crayon
I am smiling at nature that goes on
Greet me, I greet you forever and ever
See me, I see you and leave you never
Oh God ! What a great creation you make
For the leisure of creatures and their sake

Question 11.
Clouds once seen at a particular point, may not be there after sometime? Why?
Answer:

• The clouds once seen at a particular point may not be there after sometime.
• This is because of the movement of clouds from high pressure areas to lower pressure areas.
• Pressure influences the movement of clouds.
• The difference in pressures in two different areas leads to the movement of air.
• Thus the clouds also move along with air from high pressure area to low pressure area.

Question 12.
Revanth blew air from his mouth onto the mirror while he was getting ready togo to school. He observed that the image in the mirror was not clear. Do you have any doubts to raise in this situation ? Prepare questions on your doubts.
Answer:
Revanth blew air from his mouth onto the mirror. He confused at the appearance of moist layer on the mirror. He doubted and may have questioned himself in the following way.

• What is the reason for the formation of some moist layer on the mirror?
• Why did the mirror become unclear after blowing air on it by mouth?
• What comes out of my mouth while blowing?
• Does it happen even for other animals also?

Question 13.
If it is raining in a village you don’t find rain another village. Why do you think it is happening so?
Answer:

• Often we see that there may be rain in some area, where it may not be in its adjacent areas.
• This is because of condensation of clouds due cool air which affects on them in the specific area.
• Occurance of winds won’t be same in all the areas. Pressure influences on the presence of air.
• Clouds along with winds move from high pressure area to low pressure area at which cool air occurs.
• That why rain is seen only in some areas, where we can’t see it in its adjacent areas.

Question 14.
If condensation fails to occur in nature what happens?
Answer:
If there is no occurance of condensation in the water, water cycle stops due to lack of rains.
If there are no rains water sources will not be filled with water.
Even ground water level decreases.
Low percentage of water levels in the natural water bodies cause damage to the living kingdom, thus it finally lead to destruction of nature.
Hence condensation process is very essential in the water cycle.

Question 15.
Why does the driver of a vehicle wipe the glass inside, even if the wiper is working on outer surface of the glass when he drives in rain?
Answer:

• The driver wipes the glass inside, even wiper is working on outer surface of the glass when he drives in rain.
• Because of the natural process called condensation rain that falls on the glass of the cabin cools its surface.
• Air inside the drivers cabin contains water vapour which is warmer than the outside surface of the glass.
• Due to the cold glass, air close to its inner surface will also become cooler.
• This changes the water vapour in the air of the inner surface of the glass into water and forms small drops on the inner surface.

TS 6th Class Science 3rd Lesson Notes Rain: Where Does it Come From?

• Water is available in nature in three forms, ice (solid form), water (liquid form) and vapour (gaseous form).
• Solid form of water is íce. Snow occurs naturally.
• The three forms of water are interchangeable.
• Evaporation : The process of changing of water into water vapour is called evaporation.
• Condensation : The process of conversion of water vapour into water is called condensation.
• Water cycle : The conversion of water into water vapour, water vapour to clouds and clouds to rain is known as water cycle.
• Cloud : Clouds are formed from tiny droplets of water vapour.
• Water vapour : The gaseous form of water is water vapour.
• Atmosphere : Atmosphere is the main factor on the earth.
• Stream : A narrow flow of water.
• Droplets : Tiny particles of water.
• Dew : Small drops of water that form on outdoor surfaces.
• Rain : Small drops of water falling from clouds.
• Hails : Winds on the earth are called hails.
• Breeze : Cool winds are called breeze.
• Wind : Movement of air from high pressure area to low pressure area.