Class 5 Exam > Class 5 Notes > Our Wondrous World Class 5 - New NCERT > Unit Test: Water—The Essence of Life
Unit Test: Water—The Essence of Life | Our Wondrous World Class 5 - New NCERT PDF Download
Time: 45 Minutes
M.M.: 20
Attempt all questions.
Question numbers 1 to 6 carry 1 mark each.
Question numbers 7 to 9 carry 3 marks each.
Question number 10 carries 5 marks.
Q1. True or False:
Most of the Earth’s water is freshwater.
Q2. Fill in the blank:
The process of water changing into water vapour is called __________.
Q3. Name one river in India that flows into the Arabian Sea.
Q4. Match the following:
Q5. Where do rivers usually begin?
Q6. Identify one method shown in the picture to help refill groundwater.
Q7. Explain the three forms of water with one example each.
Q8. List three activities you do in your daily life that use water, and one way to reduce water use for each.
Q9. Identify three ways rivers are important for people, animals, and plants.
Q10. Draw and label the diagram of the water cycle. Write two sentences each about evaporation, condensation, and precipitation.
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FAQs on Unit Test: Water—The Essence of Life - Our Wondrous World Class 5 - New NCERT
| 1. Why is water considered essential for life? |  |
Ans. Water is essential for life because it plays a crucial role in various biological processes. It serves as a solvent for biochemical reactions, helps in temperature regulation, facilitates nutrient transport, and is involved in waste elimination. Without water, living organisms cannot survive as it is fundamental for maintaining cellular functions and overall health.
| 2. What are the unique properties of water that support life? | |
Ans. Water has several unique properties that support life, including its ability to dissolve many substances, its high specific heat capacity, and its cohesive and adhesive properties. These characteristics allow water to stabilize temperatures in organisms and environments, transport nutrients and waste, and maintain cellular structure, making it vital for sustaining life.
| 3. How does water cycle through the environment? | |
Ans. The water cycle involves the continuous movement of water through evaporation, condensation, precipitation, and runoff. Water evaporates from surfaces, forming vapor that condenses into clouds. Eventually, precipitation occurs as rain or snow, replenishing bodies of water and groundwater. This cycle is crucial for maintaining ecosystems and providing fresh water for all living organisms.
| 4. What role does water play in human health? | |
Ans. Water is vital for human health as it helps regulate body temperature, aids digestion, transports nutrients, and removes waste. It also plays a key role in maintaining hydration, which is essential for proper physical and cognitive functions. Adequate water intake is important to prevent dehydration and support overall health.
| 5. How can we conserve water effectively? | |
Ans. Effective water conservation can be achieved through various methods, such as fixing leaks, using water-efficient appliances, and practicing mindful water usage, like turning off the tap while brushing teeth. Additionally, collecting rainwater for gardening and using mulch to retain soil moisture can significantly reduce water waste and promote sustainable use of this precious resource.
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