Class 6 Exam > Class 6 Videos > Science for Class 6 > Audio Notes: A Journey through States of Water
Audio Notes: A Journey through States of Water Video Lecture | Science for Class 6
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FAQs on Audio Notes: A Journey through States of Water Video Lecture - Science for Class 6
| 1. What are the three states of water, and how do they differ from one another? |  |
Ans. The three states of water are solid (ice), liquid (water), and gas (water vapor). In the solid state, water molecules are closely packed together and have a fixed shape, which we observe as ice. In the liquid state, water molecules are still close but can move freely, allowing it to flow and take the shape of its container. In the gas state, water vapor molecules are spread out and move rapidly, filling the space available to them.
| 2. How does temperature affect the state of water? | |
Ans. Temperature plays a crucial role in determining the state of water. When water is cooled below 0°C, it freezes and becomes ice (solid). As the temperature rises above 0°C and reaches 100°C, ice melts into liquid water. Further heating causes liquid water to evaporate into water vapor (gas) at 100°C. Thus, the change in temperature can cause water to transition between its solid, liquid, and gas states.
| 3. What is the process of evaporation, and why is it important in the water cycle? | |
Ans. Evaporation is the process by which water changes from a liquid to a gas, usually occurring when water is heated by the sun. It is important in the water cycle because it allows water to enter the atmosphere from oceans, rivers, and lakes. The water vapor can then condense to form clouds, which eventually leads to precipitation, replenishing water sources on the earth's surface.
| 4. Can water exist in all three states simultaneously? If so, under what conditions? | |
Ans. Yes, water can exist in all three states simultaneously at a specific temperature and pressure known as the triple point. This occurs at a temperature of 0.01°C and a pressure of 611.657 pascals. At this unique point, ice, liquid water, and water vapor can coexist, demonstrating the balance of the three states of matter.
| 5. What role does water play in our daily lives and the environment? | |
Ans. Water is essential for all forms of life. It is used for drinking, cooking, sanitation, and agriculture. In the environment, it helps regulate temperature, supports ecosystems, and is involved in weather patterns. Water also plays a critical role in various industrial processes, making it a vital resource for human activities and maintaining ecological balance.
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Oct 23, 2025
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