Original notes — ready
Chapter 1: Water: The Essence of Life
CBSE (NCERT, English Medium) • Class 5 • The World Around Us (EVS) • Book: Our Wondrous World
Water: The Essence of Life — EG's own notes, in simple words
Book: Our Wondrous World (CBSE, Class 5) | Chapter 1 | Medium: English
Diagram (labels are printed on the image): The water cycle: sun, clouds, rain and river. A general teaching picture.
Children at a village well. A general picture about fresh water.
What the chapter is about
Water is the essence of life: no plant, animal or human can live without it. Our body is mostly water, plants need water to grow, and animals need it to drink.
Water comes from rain, rivers, lakes, wells and the sea. But most of the Earth's water is salty sea water, which we cannot drink. Only a small part is fresh water, so we must use it carefully.
The water cycle keeps water moving: the sun heats water, it rises as vapour, cools into clouds, and falls back as rain. This cycle has worked for millions of years.
Fresh water is also stored underground, in wells and in the soil. Rain that soaks into the ground becomes groundwater, which wells and hand pumps bring back up. Protecting the ground from dirt therefore protects our drinking water too.
What you should learn
Remember the water cycle in order: evaporation → condensation → precipitation → collection. Order questions are common in EVS.
Key Terms
- Essence — The most important part; what something cannot do without.
- Fresh water — Water that is not salty and can be drunk.
- Evaporation — Water changing into vapour by heat.
- Condensation — Vapour cooling into tiny water drops (clouds).
- Precipitation — Water falling as rain, snow or hail.
- Groundwater — Water stored under the ground in soil and rocks, reached by wells.
Remember
- All living things need water.
- Most Earth water is salty; fresh water is precious.
- Water cycle: evaporation → condensation → precipitation.
- Saving water is saving life.
Exam Tip / Common Mistake
Common mistake: saying the sea gives us drinking water directly. Sea water is salty — it must be treated first; fresh water comes from rain, rivers and wells.
Chart / Table: The water cycle
| Step | What happens |
|---|---|
| Evaporation | Sun heats water; it becomes vapour |
| Condensation | Vapour cools; clouds form |
| Precipitation | Rain falls back to Earth |
| Collection | Water gathers in rivers and lakes |
Think and try
List every tap, bucket and bottle in your home. Which ones hold drinking water, and which hold water for washing? How could your family save one bucket of water every day?
Practice set — try it yourself
- Why is water called the essence of life?
Hint: Think about living things without water. - What is evaporation?
Hint: Think about sun and vapour. - Why can we not drink sea water?
Hint: Think about salt. - Name two sources of fresh water.
Hint: Think about rivers and wells. - Write three ways to save water at home.
Hint: Think about taps, buckets and reuse.
How to use this page: Read the summary, say the Key Terms in your own words, then try the practice set without looking. Ask your teacher or parent to check your answers.