Important Questions Class 6 Science Chapter 14

Important Questions Class 6 Science Chapter 14 – Water

In science, the complexity of topics gradually increases. As students proceed to higher classes, they are introduced to advanced topics. Strengthening knowledge about foundational topics is a must for students to perform well in science. Most of the foundational topics of science are presented in Class 5, 6, 7 and 8. In Class 6, foundational concepts like electric current, magnetism, light, and its properties are taught, which are further explained in higher classes.

Chapter 14 of Class 6 provides insight on the  basic element of life, which is water, the water cycle,and various properties of water, as given below:

• Water and its origin
• Water cycle
• Cloud formation
• Rain
• Drought
• Water pollution
• Water conservation

Extramarks provides study materials for students from Class 1 to Class 12 to help them understand the chapter thoroughly and provide them with highlighted important concepts present in the chapter to help them score good marks.

To score well in exams, students must go through the NCERT textbook and CBSE revision notes by Extramarks. To get the maximum advantage in exam preparation, students must also solve Important Questions Class 6 Science Chapter 14. These question banks are carefully curated by our Science experts to ensure that the complete syllabus is covered when students are revising the questions from them.

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Important Questions Class 6 Science Chapter 14 – With Solutions

For tackling a subject like Science which involves a lot of complex theories and understanding, a lot of practise is required. Students must solve as many questions as necessary to get used to framing questions.

To make the process more efficient for students, Extramarks provides Important Questions Class 6 Science Chapter 14, which students can refer to boost their confidence.

Given below is a list of a few questions and their solutions from our question bank of Chapter 14 Class 6 Science Important Questions.

Question 1: Fill in the blanks for the following:

(a) No rainfall for a year or more may lead to _________________ in that region.

(b) Excessive rains may cause _________________.

(c) The process of converting water into its vapour is called _________________.

(d) The process of changing water vapour into water is called _________________.

Answer 1: 

(a) Absence of rainfall for a year or more may lead to drought in that region.

(b)Excessive rains may cause floods.

(c) The process of converting water into its vapour is called evaporation.

(d) The process of changing water vapour into water is called condensation.

Question 2: Which of the following activities does not involve the use of water?

(a) Washing clothes

(b) Bathing

(c) Cleaning utensils

(d) Drying wet clothes

Answer 2: (d) Drying wet clothes

Drying wet clothes does not require the same amount of water as the process of drying.The water evaporates from the wet clothes into the atmosphere, whereas in other activities like washing clothes, bathing, and cleaning utensils, water is required.

Question 3: Solve the following MCQs given below:

 (i) Which one is a process in which water changes into vapour in the atmosphere?

(a) Evaporation

(b) transpiration

(c) Precipitation

(d) condensation

Answer: (a) Evaporation

The process of changing water into vapours is called evaporation.

(ii) Which of the following is an example of potable water?

(a) ocean water

(b) groundwater at selected places

(c) river water

(d) ponds water

Answer: (b) groundwater at selected places

Groundwater in specific areas is called potable water.

(iii) Which is not a part of the water cycle?

(a) Cloud formation

(b) Rain

(c) Drinking by animals

(d) Sun

Answer:  (c) Drinking by animals

Drinking by animals is not a part of the water cycle.

(iv) Which of the following is a result of condensation of water vapours?

(a) Rain

(b) Hail

(c) Snowfall

(d) Tiny water droplets

Answer: (d) Tiny water droplets

Water vapour,being lighter, rises up in the atmosphere and cools down due to temperature fall. It condenses and forms a tiny water droplet.

(v) Which one of the following is the purest form of water?

(a) River water

(b) Groundwater

(c) Rainwater

(d) Ocean water

Answer: (c) Rainwater

Purest form of water is rainwater.

(vi) Circulation of water between ocean and land is called as_______.

(a) water cycle

(b) water management

(c) water harvesting

(d) rain cycle

Answer: (a) water cycle

Water cycle is called the constant flow of water from the earth to the atmosphere and back to earth.

(vii) The percentage of water in potatoes is____.

(a) 88

(b) 75

(c) 90

(d) 95

Answer: (b) 75

75% of potatoes are water.

(viii) Which is not a source of surface water from the options below?

(a) rainwater

(b) river and lake water

(c) Spring water

(d) seawater

Answer:(c) Spring water

Examples of surface water are rainwater, river water, and seawater.

(ix)Water boils at which temperature?

(a) 100°C

(b) 101°C

(c) 99°C

(d) 102°C

Answer: (a) 100°C

Water boils at 100°C.

(x) Plants release a large amount of water vapour into the atmosphere through the process called:

(a) evaporation

(b) condensation

(c) precipitation

(d) transpiration

Answer: (d) transpiration

Plants, through a process known as transpiration, emit large amounts of water vapour into the atmosphere.It helps maintain the osmotic balance in plants.

(xi) In which of the following activities will you use a minimum amount of water?

(a) Bathing

(b) Brushing teeth

(c) Washing clothes

(d) Mopping a room

Answer: (b) brushing teeth.

In brushing, we use a minimum amount of water.

(xii) The quantity of water required to produce one page of your book is:

(a) One bucket

(b) Ten buckets

(c) Two glasses

(d) Few drops

Answer: (c)Two glasses

To make one sheet of paper, almost two glasses of water are required .

(xiii) Water in our tap comes from a:

(a) River

(b) Lake

(c) Well

(d) River, lake or well

Answer: (d) river, lake or well

River, lake or well supplies water to our houses.

(xiv) In which of the following cases will the evaporation of water be the slowest?

(a)A kettle of water is kept on a burner.

(b) A bucket of water was kept on the rooftop.

(c) A glass of water is kept in a room.

(d) A tray of water is kept in sunlight.

Answer: (c)A glass of water is kept in a room.

As the temperature rises, the rate of evaporation increases as well. The temperature of the room should be lower than that of the burner, the rooftop, or the sunshine. Hence, at room temperature, evaporation will be slower.

(xv) Transpiration is a process in which plants

(a) Receive water from the soil.

(b) Absorb water vapour from the air.

(c) Prepare food from the water.

(d) Release water vapour.

Answer: (d) Release water vapour

Transpiration is defined as the loss of water in the form of vapour from the exposed sections of a plant (mostly leaves).

(xvi) Clouds are

(a) Tiny drops of water floating in the air.

(b) Particles of water vapour.

(c) Raindrops in the air.

(d)Mixture of dust and water vapour.

Answer: (a)  Tiny drops of water floating in the air.

Formation of clouds takes place when water vapour condenses in the air and creates tiny droplets of water that float high in the air.

(xvii) Wells are fed by:

(a) Pond water.

(b) Lake water.

(c) Rainwater.

(d) Groundwater.

Answer: (d) Groundwater.

Some of this water is absorbed by the ground and soil, increasing the level of groundwater. This groundwater becomes the well’s source of water.

(xviii) Floods cause extensive damage to:

(a) Crops.

(b) Property and human life.

(c) Domestic animals.

(d) All of the above.

Answer: (d) All of the above.

Floods are caused by significant rainfall and a rise in the level of any area’s water bodies. The floods are devastating and endangering animal life. Crops, property, human life, and household animals are all destroyed.

(xix) “Catch water where it falls” is the basic idea behind:

(a) Recycling of water.

(b) Making dams to store water.

(c) Rainwater harvesting.

(d) Condensation of water vapour.

Answer: (c) Rainwater harvesting

The objective was to gather as much water as possible and store it so that there would be no future water scarcity. To collect pure rainwater, people install tankers, containers, and pipes with filters.

Question 4: How are clouds formed?

Answer 4: The evaporated water vapours from water vapours rise up from the earth’s surface. When the warm air moves upward, as we go higher from the surface of the earth, the atmosphere gets cooler. Hence, the water vapour starts condensing to form tiny water droplets. These water droplets combine  and appear as clouds.

Question 5: Explain the water cycle.

Answer 5: Water changes its state to the vapour phase on heating and turns back to the liquid phase on cooling down.This change of water’s state from a liquid to a gaseous state over and over in nature is called the water cycle.

Water evaporates from bodies of water such as oceans, ponds, lakes, and rivers as a result of the sun’s heat and is carried up by the air to higher altitudes.At high altitudes, the temperature gets cooler, which enables the water vapour to convert into

Tiny water droplets When water droplets in clouds come closer together and combine, they form water drops. As the clouds begin to grow heavier, it rains.

The rain is then absorbed by the soil, which is then taken up by the plants and fills up the rivers, lakes, and ultimately the oceans. Through which evaporation occurs. This completes the water cycle. The water cycle helps maintain a continuous supply of fresh water for all living things on land.

Question 6: When does a drought occur?

Answer 6: Drought is a condition where all the water content present in the soil is lost. This happens due to the lack of rain in that area for 2-3 years, which results in a lack of replenishing water content in the soil, which is lost due to evaporation. Since it is not replenished by rain, the soil becomes extremely dry, wells dry up, and the groundwater becomes scarce.

Question 7: Why do wet clothes placed on a clothesline get dry after some time? Explain.

Answer 7: Wet clothes placed on a clothesline get dry after some time due to the process of evaporation. On exposing wet clothes to sunlight, the water present in the clothes gets converted into water vapour and escapes into the atmosphere due to the heat present in the surroundings. As a result, wet clothes become dry after some time.

Question 8: What effect does cement or concrete flooring have on groundwater levels?

Answer 8: Concrete and cement are non-porous materials with no pores. Due to a lack of pores, water cannot pass through. So when it rains, the rainwater falls on concrete floors, is unable to seep through, and decreases the groundwater level. As rainwater seepage is hampered, the groundwater level is not being replenished and recharged.

Question 9: Why is there a need to conserve water? Give two reasons.

Answer 9: Conserving water is very crucial for survival as the amount of available water suitable for human use is decreasing, and water pollution is increasing. Given below are two reasons for the need to conserve water:

1. The water table and groundwater content are dropping at an alarming rate. Hence, we must use water consciously.
2. Due to climate change and global warming, precipitation is decreasing. This results in water scarcity and, ultimately, drought. Hence the need to use water judiciously.
3. The world’s population is increasing rapidly. But the water resources are limited. To prevent a water shortage for future generations, we must conserve water and protect it for future use.

Question 10: Explain the process of rooftop rainwater harvesting.

Answer 10:  The process of collecting rainwater on the rooftops and harvesting it by storing it in water tanks via pipes for further use is called rooftop rainwater harvesting. As the water may contain impurities, it is filtered and sent directly to pits in the ground via pipes to recharge groundwater.

Question 11:

Which of the following statements is “true”?

(a) Water vapour is present in the air only during the monsoon. 

(b) Water evaporates into the air from oceans, rivers, and lakes but not from the soil.

(c) The process of water changing into vapour is called evaporation.

(d) The evaporation of water takes place only in sunlight.

(e) Water vapour condenses to form tiny droplets of water in the upper layers of air, where it is cooler.

Answer 11:

1. a) False

Water vapour is present in the atmosphere throughout the year, irrespective of the season.

1. b) False

Evaporation of water takes place from oceans, rivers, and lakes, as well as from soil.

1. c) True

Evaporation is defined as the process of water changing into vapour.

1. d) False

Evaporation of water takes place even in the absence of sunlight.

1. e) True

Water vapour condenses to form tiny droplets of water in the upper layers of air, where it is cooler.

Benefits of Solving Important Questions Class 6 Science Chapter 14

Important Questions Class 6 Science Chapter 14 has been carefully curated by experienced Science teachers to meet the needs of students.This question bank contains questions with a higher chance of appearing in the exam. As a result, it is critical for students to answer questions from our Important Questions Science Chapter 14 Class 6 to ensure thorough preparation.

Given below are few of the benefits that students will get while solving questions from our question bank of Important Questions Class 6 Science Chapter 14 provided:

1. Students are advised to regularly solve question banks by using Extramarks. By solving this question bank, students can revise the whole chapter while solving the questions. They also learn the application of previously learned concepts.
2. The questions provided in Important Questions Class 6 Science Chapter 14 consist of topics from all corners of the chapter. Thus, solving the question bank will allow students to revise the chapter while knowing all the important concepts of the chapter.
3. Important Questions Class 6 Science Chapter 14 contains questions of different formats, like Multiple Choice Questions[MCQs], very short answer questions, short answer type questions, and long answer type questions. By practising so many questions, students get a real-exam type of practice, which helps them perform better in the actual exam.
4. For optimum utilisation, students must read the NCERT textbook and NCERT exemplar thoroughly, then solve Science Chapter 14 Class 6 Important Questions to self-assess themselves and their preparation.

Extramarks provides comprehensive study materials to students of Class 1 to Class 12 designed to aid students in excelling in the subject. Their motto is to provide extra support to the students, to help them score well in exams. Students can get access to the educational resources by clicking on the links given below:

• NCERT Books
• Important Formula
• CBSE Revision Notes
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• CBSE Past Years’ Question Paper
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