CBSE Class 6 Science Exemplar Chapter 14: Water - NCERT Solutions

Reviewed by · Updated on

NCERT Solutions PDF Class 6 PDF

CBSE Class 6 Science Chapter 14, 'Water,' introduces students to the vital role water plays in our lives. This chapter explores various aspects of water, including its importance, sources, and the different ways we use it. You'll learn about the surprising amount of water consumed in everyday activities like brushing teeth and in industrial processes such as paper manufacturing. The NCERT Solutions provide clear explanations on how tap water reaches our homes, what influences how quickly water evaporates, and the process of transpiration in plants. Furthermore, the solutions detail how clouds are formed and how groundwater replenishes wells. Understanding these concepts is key to appreciating water's significance and preparing thoroughly for your science exams.

Home

Quick info

BoardCBSE
ClassClass 6
SubjectScience Exemplar
Session2026
LanguageEnglish
TypeNCERT Solutions
ChapterChapter 14

Chapter summary

Chapter 14 of the CBSE Class 6 Science Exemplar focuses on 'Water.' The NCERT Solutions provided here clarify concepts such as water usage in daily activities, the difference in water consumption for tasks like bathing versus brushing teeth, and the water footprint of paper production. It also explains the sources of tap water, factors influencing evaporation, the biological process of transpiration, the composition of clouds, and the replenishment of groundwater that feeds wells.

Learning outcomes

  • Identify activities that do and do not require water.
  • Compare the amount of water used in different daily activities.
  • Understand the water required for paper production.
  • Identify the sources of tap water.
  • Explain the factors affecting the rate of evaporation.
  • Define and explain transpiration in plants.
  • Describe the formation of clouds.
  • Explain how wells are replenished by groundwater.

Topics covered

Paper topics

  • Water usage in daily activities
  • Water conservation
  • Water sources (rivers, lakes, wells)
  • Tap water supply
  • Evaporation of water
  • Factors affecting evaporation
  • Transpiration in plants
  • Cloud formation
  • Groundwater and wells

Important topics

  • Water usage comparison
  • Factors affecting evaporation
  • Transpiration process
  • Cloud formation
  • Sources of water

PDF preview

Read page by page below. PDF is streamed from the official NCERT website — no download button on this page.

Loading document …
Page of
Loading page …

Questions and Solutions

Question 1

Which of the following activities does not involve the use of water?
  1. Washing clothes
  2. Bathing
  3. Cleaning utensils
  4. Drying wet clothes
Solution: (d): Drying wet clothes.

Drying wet clothes is a process where water evaporates from the fabric and turns into water vapor, rather than actively using water for cleaning or other purposes. Activities like washing clothes, bathing, and cleaning utensils all directly require the application of water.

Question 2

In which of the following activities will you use the minimum amount of water?
  1. Bathing
  2. Brushing teeth
  3. Washing clothes
  4. Mopping a room
Solution: (b): Brushing teeth.

Among the given options, brushing teeth requires the least amount of water. Activities such as bathing, washing clothes, and mopping a room typically consume a much larger volume of water to be effective.

Question 3

The quantity of water required to produce one page of your book is:
  1. one bucket
  2. ten buckets
  3. two glasses
  4. few drops.
Solution: (c): two glasses.

The production of paper, which is used to make books, is a water-intensive process. It is estimated that approximately two glasses of water are needed to produce a single sheet of paper.

Question 4

Water in our tap comes from a:
  1. river
  2. lake
  3. well
  4. river, lake or well
Solution: (d): river, lake or well.

The water supplied to our taps is sourced from natural water bodies such as rivers and lakes, or from underground sources like wells. This water undergoes treatment processes at water treatment plants before it is distributed through the tap system and is made fit for consumption.

Question 5

In which of the following cases will evaporation of water be slowest?
  1. A tray of water kept in sunlight.
  2. A kettle of water kept on a burner.
  3. A glass of water kept in a room.
  4. A bucket of water kept on a rooftop.
Solution: (c): A glass of water kept in a room.

Evaporation is a process that is significantly influenced by temperature; higher temperatures lead to faster evaporation. Among the given options, a room generally has a lower temperature compared to direct sunlight, a burner, or a rooftop exposed to the sun. Therefore, the evaporation of water from a glass kept in a room will be the slowest.

Question 6

Transpiration is a process in which plants:
  1. receive water from soil
  2. absorb water vapour from air
  3. prepare food from water
  4. release water vapour
Solution: (d): release water vapour.

Transpiration is the process by which plants lose water in the form of vapor. This loss primarily occurs through small pores, mainly on the leaves, which are exposed to the atmosphere. The amount of water lost through transpiration can be substantial.

Question 7

Clouds are:
  1. tiny drops of water floating in air
  2. mixture of dust and water vapour
  3. particles of water vapour
  4. rain drops in air.
Solution: (a): tiny drops of water floating in air.

Clouds are formed when the water vapor present in the air cools down and condenses into very small droplets of water or ice crystals. These tiny droplets then float in the air, appearing to us as clouds. Eventually, these droplets may combine to form larger drops, leading to rainfall.

Question 8

Wells are fed by:
  1. pond water
Solution:

Wells are fed by groundwater. Rainwater seeps into the ground and replenishes the underground water table. Wells are dug deep enough to reach this groundwater, which then fills the well.

Common mistakes

  • Confusing activities that use water with those that don't.
  • Underestimating the water needed for tasks like washing clothes or mopping.
  • Not understanding the relationship between temperature and evaporation rate.
  • Confusing condensation with evaporation in the context of cloud formation.

Revision tips

  • Review the list of activities to differentiate water usage.
  • Focus on understanding the factors that influence evaporation.
  • Memorize the definition and process of transpiration.
  • Visualize the steps involved in cloud formation from water vapor.

Practice MCQs

Q1. Which of the following activities does NOT directly involve the use of water?

Q2. Which activity typically requires the minimum amount of water?

Q3. Approximately how much water is estimated to be needed to produce one page of a book?

Q4. Tap water is typically supplied from which sources?

Q5. Under which condition will the evaporation of water be the slowest?

Q6. What is transpiration in plants?

Q7. Clouds are primarily composed of:

Frequently asked questions

What is the main focus of Chapter 14, 'Water', for Class 6 Science?

Chapter 14 focuses on understanding the importance of water, its various uses in daily life, its sources, and natural processes like evaporation, transpiration, and cloud formation.

How do these NCERT Solutions help students prepare for exams?

The solutions provide clear, step-by-step explanations for each question, helping students understand the concepts thoroughly and reinforcing their knowledge for better exam performance.

What are the primary sources of water mentioned in the solutions?

The solutions mention rivers, lakes, and wells as the primary natural sources from which water is drawn for supply, including tap water.

Can you explain the difference between evaporation and transpiration?

Evaporation is the process of water turning into vapor from any surface, while transpiration is specifically the release of water vapor from plants, mainly through their leaves.

What causes clouds to form?

Clouds form when water vapor in the air cools and condenses into tiny water droplets or ice crystals that float in the atmosphere.

Important links

Content reviewed by the NCERT Help team. Editorial Team and update policy

NCERT Solutions PDF PDF on NCERT Help. URL unchanged for search indexing.