π NCERT Intext Questions β A Journey through States of Water (Class 6)
π§ Q.1. Reflect on what you did really well in this activity.
(Page No. 101)
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π§ Q.1. Reflect on what you did really well in this activity.
(Page No. 101)
Answer: I spread some water on a plate and also kept a little water in a bottle cap.
I observed that water on the plate evaporated faster because a larger surface area was exposed to air.
In the bottle cap, the water evaporated slowly since less surface was open to air. I compared both carefully and recorded my observations neatly. ππ¨
π‘ Did You Know?
The larger the exposed surface area, the faster evaporation takes place β thatβs why puddles dry quicker than water in a cup! π§
π§οΈ Q.2. What did I do well? Was I able to label all the parts of the water cycle? Which parts of the water cycle were unclear to me?
(Page No. 102)
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π§οΈ Q.2. What did I do well? Was I able to label all the parts of the water cycle? Which parts of the water cycle were unclear to me?
(Page No. 102)
Answer: I did well in understanding and labelling most parts of the water cycle.
I was able to correctly label Evaporation, Condensation, Rain, Cloud, River, Lake, and Ocean. πβοΈπ§οΈ
These helped me understand how water changes its state and moves in nature.
However, I found it a bit unclear to show Groundwater and how snow forms on mountains during condensation. Iβll revise this part again for better understanding. βοΈπ§
(Label the given parts of the Water Cycle diagram.)
π Diagram Labelling β The Water Cycle
Use the given words to label the diagram correctly:
β‘οΈ Cloud
β‘οΈ Evaporation (from Ocean, Lake, and River)
β‘οΈ Condensation (formation of clouds)
β‘οΈ Rain / Snow (precipitation)
β‘οΈ River β Lake β Ocean (collection of water)
β‘οΈ Groundwater (water stored under the Earthβs surface)
Use the given words to label the diagram correctly:
β‘οΈ Cloud
β‘οΈ Evaporation (from Ocean, Lake, and River)
β‘οΈ Condensation (formation of clouds)
β‘οΈ Rain / Snow (precipitation)
β‘οΈ River β Lake β Ocean (collection of water)
β‘οΈ Groundwater (water stored under the Earthβs surface)
π Process Summary:
The water from oceans, lakes, and rivers evaporates into the air as vapour. It condenses to form clouds and then returns as rain or snow. This water flows back into rivers and oceans, completing the water cycle. π§οΈπ
The water from oceans, lakes, and rivers evaporates into the air as vapour. It condenses to form clouds and then returns as rain or snow. This water flows back into rivers and oceans, completing the water cycle. π§οΈπ
π‘ Did You Know?
Only about 1% of all water on Earth is freshwater that humans and animals can use β the rest is salt water or frozen! βοΈπ¦
Let us enhance our learning
βοΈ Q.1. Which of the following best describes condensation?
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βοΈ Q.1. Which of the following best describes condensation?
(i) The conversion of water into its vapour state.
(ii) The process of water changing from a liquid into a gaseous state.
(iii) The formation of clouds from tiny water droplets.
(iv) The conversion of water vapour into its liquid state.
Answer: (iv) The conversion of water vapour into its liquid state.
π‘ Explanation:
When water vapour cools down, it becomes liquid water again. This process is called condensation β it forms dew, fog, and clouds in nature. π«οΈβοΈ
π Q.2. Identify in which of the given processes, evaporation is very important β
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π Q.2. Identify in which of the given processes, evaporation is very important β
(i) Colouring with:
(a) crayonsβ(b) water coloursβ(c) acrylic coloursβ(d) pencil colours
Answer: (b) Water colours π¨
π‘ Explanation:
When we paint using water colours, the water evaporates, leaving behind the colour on paper.
(ii) Writing on paper with:
(a) pencilβ(b) ink penβ(c) ball point pen
Answer: (b) Ink pen βοΈ
π‘ Explanation:
In ink pens, the liquid ink dries up due to evaporation, making the writing permanent.
πΏ Q.3. We see green plastic grass at many places these days. Space around natural grass feels cooler than space around plastic grass. Can you find out why?
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πΏ Q.3. We see green plastic grass at many places these days. Space around natural grass feels cooler than space around plastic grass. Can you find out why?
Answer: Natural grass contains water that evaporates slowly, using heat from the surroundings. This reduces the air temperature and makes the area feel cooler. π¬οΈπ§
Plastic grass does not contain water, so no evaporation happens β the area stays hotter.
π‘ Did You Know? Evaporation is a natural cooling process β thatβs why we sweat when itβs hot! π
π§΄ Q.4. Give examples of liquids other than water that evaporate.
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π§΄ Q.4. Give examples of liquids other than water that evaporate.
Answer: Some liquids that evaporate easily are β
1οΈβ£ Alcohol (used in sanitizers) π§Ό
2οΈβ£ Perfume or deodorant π¨
3οΈβ£ Petrol or kerosene β½
π‘ Explanation: These liquids are volatile, meaning they evaporate quickly even at room temperature.
π¨ Q.5. Fans move air around, creating a cooling sensation. It might seem strange to use a fan to dry wet clothes since fans usually make things cooler, not warmer. Normally, when water evaporates, it requires heat, not cold air. What do you think about this?
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π¨ Q.5. Fans move air around, creating a cooling sensation. It might seem strange to use a fan to dry wet clothes since fans usually make things cooler, not warmer. Normally, when water evaporates, it requires heat, not cold air. What do you think about this?
Answer: The fan helps by moving air and carrying away the moist air from the clothes. This allows dry air to come in contact with the wet surface again, speeding up evaporation β even though the air itself is cool. π¬οΈπ
π‘ Tip: Evaporation depends more on air movement and exposed area than just heat.
ποΈ Q.6. Usually, when sludge is removed from drains, it is left in heaps next to the drain for 3β4 days. Afterward, it is transported to a garden or a field where it can be used as manure. This approach reduces the transportation cost of the sludge and enhances the safety of individuals handling it. Reflect upon it and explain how.
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ποΈ Q.6. Usually, when sludge is removed from drains, it is left in heaps next to the drain for 3β4 days. Afterward, it is transported to a garden or a field where it can be used as manure. This approach reduces the transportation cost of the sludge and enhances the safety of individuals handling it. Reflect upon it and explain how.
Answer: The sludge contains a lot of water. When left in heaps, sunlight and wind cause the water to evaporate, making it dry and lighter. βοΈπ¨ This makes it easier and cheaper to transport.
π‘ Did You Know? This method uses natural evaporation β an eco-friendly way to dry and reuse waste without machines or extra fuel. πβ»οΈ
π¨ Q.7. Observe the activities in your house for a day. Identify the activities that involve evaporation. How does understanding the process of evaporation help us in our daily activities?
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π¨ Q.7. Observe the activities in your house for a day. Identify the activities that involve evaporation. How does understanding the process of evaporation help us in our daily activities?
Answer: Some activities at home where evaporation takes place are β
1οΈβ£ Drying wet clothes under the fan or sun π
2οΈβ£ Cooling hot tea or milk when left open β
3οΈβ£ Drying mopped floors after cleaning π§Ή
4οΈβ£ Sweating β our body cools down when sweat evaporates π
Understanding evaporation helps us:
β’ Dry clothes faster by spreading them out or using fans,
β’ Store perfumes, fuels, and liquids carefully to avoid quick loss,
β’ Use evaporation for cooling, like in earthen pots (matkas).
β’ Dry clothes faster by spreading them out or using fans,
β’ Store perfumes, fuels, and liquids carefully to avoid quick loss,
β’ Use evaporation for cooling, like in earthen pots (matkas).
π‘ Did You Know? Evaporation is a natural cooling process, thatβs why sweat helps our body stay cool on hot days! π
π§ Q.8. How is water present in the solid state in nature?
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π§ Q.8. How is water present in the solid state in nature?
Answer: In nature, water in its solid state is found as:
β’ Ice on mountains and glaciers ποΈ
β’ Snow in cold regions βοΈ
β’ Hailstones during storms π¨οΈ
β’ Icebergs floating in polar seas π§
π‘ Tip: When the temperature falls below 0Β°C, water freezes and turns into solid ice.
π Q.9. Reflect on the statement β βWater is our responsibility before it is our right.β Share your thoughts.
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π Q.9. Reflect on the statement β βWater is our responsibility before it is our right.β Share your thoughts.
Answer: This statement means that we should take care of water before we claim the right to use it. Water is essential for life, and wasting or polluting it harms everyone.
We can be responsible by:
π§ Turning off taps properly,
πΏ Using only the water we need,
π― Keeping water bodies clean,
π¦οΈ Storing rainwater (rainwater harvesting).
π§ Turning off taps properly,
πΏ Using only the water we need,
π― Keeping water bodies clean,
π¦οΈ Storing rainwater (rainwater harvesting).
π‘ Conclusion: Every drop of water is precious. Saving water is not just a choice β itβs our duty! π
βοΈ Q.10. The seat of a two-wheeler parked on a sunny day has become very hot. How can you cool it down?
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βοΈ Q.10. The seat of a two-wheeler parked on a sunny day has become very hot. How can you cool it down?
Answer: To cool down the hot seat:
1οΈβ£ Sprinkle or pour a little water on it. π§
2οΈβ£ Wait for a few minutes β as the water evaporates, it absorbs heat from the seat.
3οΈβ£ The seat becomes cooler and comfortable to sit on. π΅
π‘ Did You Know? Evaporation always causes cooling because it uses up heat energy from the surrounding surface. π‘οΈβ¬οΈ
π Explore More Class 6 Chapters (Questions and Answers)
πChapter 1 β The Wonderful World of Science
π¦Chapter 2 β Diversity in the Living World
π₯Chapter 3 β Mindful Eating
π§²Chapter 4 β Exploring Magnets
πChapter 5 β Measurement of Length & Motion
π§±Chapter 6 β Materials Around Us
π‘οΈChapter 7 β Temperature & Measurement
π§Chapter 8 β States of Water
βοΈChapter 9 β Methods of Separation
πΎChapter 10 β Living Creatures
πΏChapter 11 β Nature's Treasures
πChapter 12 β Beyond Earth
