CBSE Class 6 Science Chapter 14: Water NCERT Solutions

Reviewed by · Updated on

NCERT Solutions PDF Class 6 PDF

This chapter delves into the fundamental concepts of water, crucial for Class 6 Science students. The NCERT Solutions for Chapter 14: Water provide clear explanations and step-by-step answers to exercises covering the water cycle, evaporation, and condensation. Students will learn about the different states of water and the processes that transform them. These solutions clarify how water changes from liquid to vapor (evaporation) and how vapor turns back into liquid (condensation), often observed in everyday phenomena like fog or dew. The chapter also addresses the impact of extreme weather conditions like droughts and floods. By working through these solutions, students will gain a solid understanding of water's behavior and its importance in our environment, aiding in effective exam revision.

Home

Quick info

BoardCBSE
ClassClass 6
SubjectScience
Session2026
LanguageEnglish
TypeNCERT Solutions
ChapterChapter 14: Water

Chapter summary

Chapter 14 of Class 6 Science focuses on Water, exploring its various forms and transformations. The NCERT Solutions cover key processes such as evaporation and condensation, explaining how water vapor in the air turns into liquid water and vice versa. It also touches upon the consequences of insufficient or excessive rainfall, like drought and floods. These solutions aim to build a foundational understanding of the water cycle and everyday water-related phenomena for young learners.

Learning outcomes

  • Understand the processes of evaporation and condensation.
  • Identify everyday examples of evaporation and condensation.
  • Explain the causes of drought and floods.
  • Describe the role of water vapor in the atmosphere.
  • Recognize the importance of water conservation.

Topics covered

Paper topics

  • Water
  • Evaporation
  • Condensation
  • Water Vapor
  • Drought
  • Flood
  • Water Cycle Basics
  • States of Water

Important topics

  • Evaporation
  • Condensation
  • Causes of Drought and Flood
  • Everyday Examples of Water Processes

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

Fill up the blanks in the following:

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

(b) The process of changing water vapour into water is called ______.

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

(d) Excessive rains may cause _____.

Solution:

(a) The process of changing of water into its vapour is called evaporation. This is when liquid water absorbs heat and transforms into a gaseous state, known as water vapor.

(b) The process of changing water vapour into water is called condensation. This occurs when water vapor cools down and releases heat, returning to its liquid state.

(c) No rainfall for a year or more may lead to drought in that region. A drought is a prolonged period of abnormally low rainfall, leading to a shortage of water.

(d) Excessive rains may cause flood. Flooding happens when an overflow of water submerges land that is usually dry, often due to heavy or prolonged rainfall.

Question 2

State for each of the following whether it is due to evaporation or condensation:

(a) Water drops appear on the outer surface of a glass containing cold water.

(b) Steam rising from wet clothes while they are ironed.

(c) Fog appearing on a cold winter morning.

(d) Blackboard dries up after wiping it.

(e) Steam rising from a hot girdle when water is sprinkled on it.

Solution:

(a) Water drops appear on the outer surface of a glass containing cold water. This is due to condensation. The cold surface of the glass cools the surrounding air, causing the water vapor in the air to condense into liquid water droplets.

(b) Steam rising from wet clothes while they are ironed. This is due to evaporation. The heat from the iron increases the temperature, speeding up the process of water turning into vapor.

(c) Fog appearing on a cold winter morning. This is due to condensation. Water vapor in the air cools down as the temperature drops, forming tiny water droplets that we see as fog.

(d) Blackboard dries up after wiping it. This is due to evaporation. The water spread on the blackboard turns into vapor and mixes with the air, leaving the board dry.

(e) Steam rising from a hot girdle when water is sprinkled on it. This is due to evaporation. The high temperature of the girdle causes the sprinkled water to rapidly turn into steam (water vapor).

Question 3

Which of the following statements are "true"?

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

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

(c) The process of water changing into its 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.

Solution:

(a) Water vapour is present in air only during the monsoon. False. Water vapor is present in the air all the time, though the amount can vary.

(b) Water evaporates into air from oceans, rivers and lakes but not from the soil. False. Water also evaporates from soil, plants, and other moist surfaces.

(c) The process of water changing into its vapour, is called evaporation. True. This is the definition of evaporation.

(d) The evaporation of water takes place only in sunlight. False. Evaporation can happen at any temperature, although it happens faster in warmer conditions and with sunlight.

(e) Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooler. True. As air rises and cools, its capacity to hold water vapor decreases, leading to condensation.

Question 4

Suppose you want to dry your school uniform quickly. Would spreading it near an anghiti or heater help? If yes, how?
Solution:

Yes, spreading your school uniform near an anghiti (a traditional Indian stove) or a heater would help it dry quickly. This is because the rate of evaporation increases with an increase in temperature. An anghiti or heater provides heat, raising the temperature of the air around the uniform. This higher temperature causes the water in the uniform to evaporate faster, thus drying it more quickly.

Question 5

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

The puddle of water around the cooled bottle is formed due to condensation. The air around us contains water in the form of invisible water vapor. When this warm, moist air comes into contact with the cold surface of the bottle, the air cools down. As the air cools, it can no longer hold as much water vapor, causing the vapor to change back into liquid water droplets. These droplets collect on the outer surface of the bottle and eventually form a puddle around it.

Question 6

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

When you breathe out, the air you exhale is warm and moist, meaning it contains a significant amount of water vapor. When this warm, moist air comes into contact with the cooler surface of your spectacles, the water vapor in your breath cools down. This cooling causes the water vapor to condense into tiny liquid water droplets on the surface of the glasses, making them appear wet and helping to clean them.

Common mistakes

  • Confusing evaporation with condensation.
  • Assuming water vapor is only present during monsoons.
  • Believing evaporation only occurs in sunlight.
  • Not recognizing that soil also evaporates water.

Revision tips

  • Review the definitions of evaporation and condensation thoroughly.
  • List at least three real-life examples for both evaporation and condensation.
  • Understand the conditions that increase the rate of evaporation.
  • Connect the concepts of drought and floods to rainfall patterns.

Practice MCQs

Q1. What is the process of changing water into its vapor called?

Q2. When water vapor in the air cools down and turns back into liquid water droplets, it is called:

Q3. Which of the following can lead to a drought?

Q4. Why do water drops form on the outside of a cold glass?

Q5. Which process helps a wet blackboard dry up after being wiped?

Frequently asked questions

What are the main processes discussed in the Class 6 Science Chapter 14 on Water?

The chapter primarily discusses evaporation, which is the process of water turning into vapor, and condensation, the process of water vapor turning back into water.

How do these NCERT Solutions help students?

These solutions provide clear, rewritten answers to all questions in Chapter 14, helping students understand the concepts of water, evaporation, and condensation better and prepare for exams.

What causes a drought?

A drought is typically caused by a lack of rainfall for an extended period, such as a year or more, leading to water scarcity in a region.

What is the difference between evaporation and condensation?

Evaporation is when liquid water changes into water vapor (gas), while condensation is when water vapor (gas) changes back into liquid water.

Are there any real-life examples of condensation mentioned?

Yes, examples include water drops appearing on the outside of a cold glass, fog on a cold morning, and spectacles becoming wet when breathing on them.

What happens if there are excessive rains?

Excessive rains can lead to floods in a region.

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.