NCERT Class 6 Science Chapter 8 A Journey through States of Water Solutions English Medium to each chapter is provided in the list so that you can easily browse through different chapters NCERT Class 6 Science Chapter 8 A Journey through States of Water Notes and select need one. NCERT Class 6 Science Chapter 8 A Journey through States of Water Question Answers Download PDF. NCERT Class 6 Solutions for Science English Medium.
NCERT Class 6 Science Chapter 8 A Journey through States of Water
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. NCERT Class 6 Science Textual Solutions are part of All Subject Solutions. Here we have given NCERT Class 6 Science Chapter 8 A Journey through States of Water Notes English Medium. CBSE Class 6 Science in English Textbook Solutions for All Chapters, You can practice these here.
A Journey through States of Water
Chapter: 8
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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 gaseous state.
(iii) The formation of clouds from tiny water droplets.
(iv) The conversion of water vapour into its liquid state.
Ans: (iv) The conversion of water vapour into its liquid state.
2. Identify in which of the given processes, evaporation is very important—
(i) Colouring with:
(a) Crayons.
(b) Water colours.
(c) Acrylic colours.
(d) Pencil colours.
Ans: (b) Water colours.
(ii) Writing on paper with:
(a) Pencil.
(b) Ink pen.
(c) Ballpoint pen.
Ans: (b) Ink pen.
3. We see green coloured plastic grass at many places these days. Space around natural grass feels cooler than space around the plastic grass. Can you find out why?
Ans: Space around natural grass feels cooler because natural grass allows for the process of transpiration and evaporation, which absorbs heat and cools the surrounding air. Plastic grass does not have this property, so it does not provide the cooling effect that natural grass does.
4. Give examples of liquids other than water, which evaporate.
Ans: Some of the examples of liquid which evaporate:
(i) Alcohol.
(ii) Oil.
(iii) Petrol.
(iv) Acetone.
(v) Sanitizer.
(vi) Milk.
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?
Ans: The rate of evaporation increases when air is moving. When we turn on the fan, the air moving across the wet clothes carry away the water vapour from them creating a drier environment around the cloth. This air-flow helps to reduce the humidity and hence speeds up the rate of evaporation. This helps in drying the cloth under the fan.
6. Usually, when sludge is removed from drains, it is left in heaps next to the drain for 3-4 days. Afterward, it is transported to a garden or a field where it can be used as manure. This approach reduces transportation cost of the sludge and enhances the safety of individuals handling it. Reflect upon it and explain how.
Ans: Leaving the sludge in heaps for 3-4 days allows for some of the water content to evaporate, reducing the volume and weight of the sludge. This makes it easier and less expensive to transport. Additionally, handling the drier sludge is safer for individuals, as it is less likely to spill or spread contaminants.
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?
Ans: Activities involving evaporation include drying clothes in the sun, noticing the smell of food cooking without being in the kitchen, and wet utensils drying after washing. Understanding evaporation helps us speed up these processes.
8. How is water present in the solid state in nature?
Ans: Water exists in the solid state in nature as: Glacier, Snow, Sea, Frost, Ice caps and Hail.
9. Reflect on the statement “Water is our responsibility before it is our right.” Share your thoughts.
Ans: This statement emphasises the importance of water and using it responsibly. Water is essential for life and other daily activities. Everyone has the right to access clean water. It is our duty to protect and preserve water resources to ensure they are available for future generations. Therefore, it is crucial to use water wisely and avoid wasting it.
10. The seat of a two-wheeler parked on a sunny day has become very hot. How can you cool it down?
Ans: To cool down the hot seat of a two-wheeler parked on a sunny day, we can:
(i) Cover it with a wet cloth: Place a damp cloth or towel over the seat. The water will absorb heat as it evaporates, cooling the seat.
(ii) Sprinkle water on it: Lightly sprinkle water directly on the seat. The evaporating water will help to lower the temperature.
(iii) Use a sunshade or cover: If available, use a sunshade or seat cover to protect the seat from direct sunlight, which will help keep it cooler.
(iv) Park in the shade: If possible, move the two-wheeler to a shaded area to reduce the seat’s exposure to direct sunlight.
My self Nikita Chetry. I have completed my BA from Silapathar College, Silapathar. I am working in Dev Library as a Content Manager. A website that provides all SCERT, NCERT 3 to 12, and BA, B.com, B.Sc, and Computer Science with Post Graduate Notes & Suggestions, Novel, eBooks, Health, Finance, Biography, Quotes, Study Materials, and more.
