An Overview of Important Questions Class 6 Science Chapter 14
Very Short Answer Questions: 1 Mark
1. Answer in one to two words.
The process by which water vapour is formed from water.
Ans: Evaporation.
The process by which clouds cause rains.
Ans: Condensation
The largest source of water on earth.
Ans: Oceans
The process by which water is circulated between land and air.
Ans: Water cycle.
The main reason for droughts in a place.
Ans: Insufficient rainfall.
Why is water required for agriculture?
Ans: Irrigation.
During evaporation water gets converted to what form?
Ans: Water vapour.
During condensation water gets converted to what form?
Ans: Liquid.
Loss of water as water vapour by plants.
Ans: Transpiration.
Collection and storage of rainwater for future use.
Ans: Rainwater harvesting.
Water that has seeped into the earth.
Ans: Groundwater
Short Answer Questions: 3 Marks
2. Explain how oceans are important in the water cycle.
Ans: The oceans are the world's largest supply of fresh water. Oceans have the most surface area exposed to the sun for evaporation. As a result, the oceans provide the majority of the water that changes to water vapour in the atmosphere. Clouds develop when the water vapour condenses. Clouds collect and condense water, becoming bigger droplets that descend to Earth as rain, snow, or hail. Oceans are thus necessary for the formation of sufficient water vapour, which aids in the water cycle.
3. How does concrete flooring affect groundwater?
Ans: Concrete is a porous material with no pores. It prevents water from passing through. As a result, when rain falls on concrete floors, it cannot seep through. This prevents rainwater from replenishing groundwater. Because rainwater seepage to groundwater is hampered, groundwater cannot be recharged, and the water table suffers as a result.
4. What is rainwater harvesting? Describe two methods to harvest rainwater.
Ans: Rainwater harvesting is the collection and storage of rainwater for later use.
This allows rainwater to be utilised in seasons and times when there is a scarcity of water. There are two techniques to collect rainwater:
Rooftop rainwater can be captured by collecting and channelling rainwater collected on roofs through pipes to a recharge pit or storage tank. Rainwater collected in tanks can be used immediately or allowed to soak into the earth to recharge the groundwater and maintain the water table.
Rainwater can be diverted to rainwater drains, which can then be channelled to recharge pits, replenishing the groundwater table.
Long Answer Questions: 5 Marks
5. Explain the water cycle with the help of a diagram.
Ans:
Water Cycle
The water cycle describes the cyclical movement of water from the earth to the atmosphere and back to the earth through various processes such as evaporation, condensation, and so on.
a) Evaporation: Heat from the sun evaporates water from the earth's surface, including land, oceans, lakes, rivers, and other bodies of water. Water evaporates and rises into the atmosphere.
b) Transpiration: Water evaporates from the surface of leaves and rises into the air as water vapour.
c) Condensation: As water vapour climbs higher into the air, it cools and condenses, forming water droplets in the shape of clouds.
d) Precipitation: When clouds get saturated with water, they rain, snow, hail, or sleet on the ground.
e) Percolation: Some of the rain that falls on the earth is able to percolate into the soil and replenish groundwater.
f) Surface run-off: Water that falls on slopes is carried down by gravity and subsequently deposited in bodies of water.
6. What causes floods? What is the impact of floods on human life?
Ans: Floods occur when water levels in rivers, cities, and villages rise to dangerously high levels. Floods are produced by excessive rainfall combined with a lack of rainwater drainage. Floods have a variety of effects on people's lives.
Causes crop fields to be submerged, resulting in crop destruction.
Causes forest submersion.
Causes villages, towns, and cities to be submerged, disrupting regular life.
Flooding raises the risk of water-borne infections in villages and cities.
Floods cause property damage
Floods have an impact on aquatic species because they are brought to land during floods and stay stuck even after the flood waters have receded. This is what kills them.
Floods have an impact on soil organisms.
CBSE Important Questions Class 6 Science Chapter 14
Importance of Learning About Water
It is essential to learn about water because it is one of the primary needs of life. The NCERT Class 6 Science Chapter 14 important questions are based on the different water states and their application. You can also know about the water cycle and the details of how it takes place. Here are some elements of the state of water:
Ice: Ice is the solid form of water, and the molecules of ice are closely packed. You can get ice naturally in the area where the temperature goes below 0 degrees celsius. Moreover, it is needed in many industries and used as a coolant in refrigerators.
Water: Water is the liquid state of the compound. It is a prominent compound in the world. It is one of the best lubricants and the only compound that vitally supports life on earth. The molecules in this compound are loosely packed than ice.
Water Vapour: Water vapour is the gaseous state of the compound named water, and it also has many applications you learn in the chapter.
Other Concepts Related To Water
Some other concepts that you can learn about water from NCERT Class 6 Science book are as follows:
Storage: The natural storage of water and how you can execute it and avoid wastage. Learning about the means of water storage can help you to store drinkable water. As a result, there will be lesser chances of wastes. From the ‘Water’ chapter, you can know about the places where freshwater and saltwater are naturally found.
Water Management: The basics of water management are also taught in the chapter. If you face any problem, try to refer to the water Class 6 questions and answers from the Vedantu site.
Solved Examples
Q1. In What Ways the Oceans Are Crucial for the Water Cycle?
Answer: The oceans play a vital role in the case of the water cycle. They are the main reservoirs of water from where it gets evaporated. Moreover, the oceans are the first to receive the rains when the water condenses. Without the presence of oceans, the water cycle would not take place properly.
Q2. How Floods Take Place?
Answer: The floods take place due to the abrupt increase in water level in a certain place. It occurs due to substantial erosion and heavy rainfall or as an aftermath of an earthquake.
What are the Benefits of Important Questions from Vedantu for Class 6 Science Chapter 14 - Water
Dive into the fascinating world of Vedantu's Important Questions for Class 6 Science Chapter 14 - Water! As you embark on this aquatic journey, these questions serve as trusty companions, guiding you through the depths of water-related knowledge with ease.
1. Focus on Key Topics:
Imagine you have a map highlighting the exciting spots to explore in the ocean—Vedantu's Important Questions focus on key water topics, ensuring your study journey is efficient and rewarding.
2. Exam Preparation and Anxiety Reduction:
Like having a life jacket in rough waters, these questions prepare you for exams, reducing anxiety by covering crucial aspects of the chapter, making you feel secure in your knowledge of water.
3. Reinforcement of Fundamental Concepts:
Think of these questions as friendly reminders, reinforcing fundamental water concepts. They act like buoyant support, ensuring your understanding remains afloat in the vast sea of information.
4. Teaches Effective Time Management:
Picture yourself as a skilled sailor navigating through varied water conditions—Vedantu's Important Questions teach effective time management, ensuring you smoothly sail through your study sessions.
5. Enables Self-assessment and Progress Tracking:
Just as a captain charts the course of a ship, these questions enable self-assessment and progress tracking, guiding you to navigate your learning voyage effectively and reach your destination with confidence.
Important Related Links for CBSE 6 Science
Conclusion
Reviewing all the crucial questions for Class 6 Science Chapter 14 - Water provides students with a solid grasp of the chapter's topics. The extra and important questions for Class 6 Science Chapter 14 - Water engage in a concept-focused discussion, encompassing all chapter themes. This question-and-answer method proves time-saving during exam prep, offering an efficient way to revise the chapter and enhance understanding. Practising these important questions streamlines preparation and boosts confidence for the upcoming exams.
FAQs on Important Questions Class 6 Science Chapter 14
1. What are some important 1-mark questions that could be asked from CBSE Class 6 Science Chapter 14, Water, for the 2025-26 exams?
For the 2025-26 exams, important 1-mark questions from this chapter often test key definitions and concepts. Students should be prepared for questions such as:
- What is the process of water turning into vapour called? (Evaporation)
- Name the process by which plants release water vapour into the air. (Transpiration)
- What is the main source of water for lakes, rivers, and wells? (Rain)
- A method for conserving rainwater for future use is known as? (Rainwater Harvesting)
2. How should I structure a 3-mark answer on the water cycle to score full marks in the Class 6 exam?
To score full marks on a 3-mark question about the water cycle, your answer should be structured clearly and include the following points:
- Begin with a concise definition of the water cycle as the continuous movement of water on, above, and below the surface of the Earth.
- Explain the three main processes in sequence: Evaporation/Transpiration (water turning into vapour), Condensation (vapour turning into clouds), and Precipitation (water falling as rain or snow).
- Drawing a simple, well-labelled diagram of the water cycle is highly recommended as it can fetch extra marks and demonstrates a better understanding.
3. Which diagrams are considered important from Chapter 14, Water, for the final exams?
In CBSE Class 6 Science, the most frequently asked diagram from the 'Water' chapter is the Water Cycle. You must practice drawing this with clear labels for evaporation, transpiration, condensation, clouds, and precipitation. Another important diagram to practice is one illustrating a rooftop rainwater harvesting system, showing how water is collected from the roof, filtered, and stored in an underground tank.
4. Why are questions related to floods and droughts frequently asked in exams?
Questions on floods and droughts are frequently asked because they test a student's ability to apply their knowledge of the water cycle to real-world phenomena. These topics assess Higher Order Thinking Skills (HOTS) by requiring students to understand the consequences of water imbalance—too much rain causing floods and a lack of it causing droughts. Answering these questions well shows the examiner that you understand the practical importance of water management.
5. What is a common mistake students make when answering questions about the causes of floods?
A common mistake is giving an oversimplified answer like "heavy rain." To secure full marks, a comprehensive answer is needed. You should state that floods are caused by heavy and prolonged rainfall over a short period, which leads to rivers and other water bodies overflowing their banks. It is also good to mention that poor drainage systems and deforestation can worsen the situation. Failing to mention the 'overflow' aspect is a frequent reason for losing marks.
6. How might a 5-mark question on water conservation be framed in the exam?
A 5-mark question on water conservation will likely test both your knowledge and ability to suggest practical solutions. It might be framed as: "'Water is precious, and we must conserve it.' Justify this statement by explaining any two methods of water conservation in detail." To answer this, you should:
- Start by briefly explaining why water is essential for life.
- Describe one method, such as Rainwater Harvesting, explaining the process and its benefits.
- Describe a second method, like preventing wastage at home (e.g., fixing leaks, turning off taps) or in agriculture (e.g., drip irrigation).
7. How does transpiration differ from evaporation, and why is this an important distinction for exams?
This is a classic question to test conceptual clarity. While both processes convert liquid water to water vapour, the key difference is their source:
- Evaporation is the process where water turns into vapour from the surface of water bodies like oceans, rivers, and lakes, or even wet clothes.
- Transpiration is a biological process where plants release water vapour into the atmosphere through small pores (stomata) in their leaves.
8. What key topics from Chapter 14 should a student focus on for objective-type questions (MCQs and Fill in the Blanks)?
For objective-type questions from the 'Water' chapter, focus on specific facts and terminology. Important areas include:
- The different forms of water (solid, liquid, gas).
- The definition of condensation as the process of converting water vapour back to liquid.
- The concept of the water table and groundwater.
- The understanding that water is a universal solvent.
- The processes that lead to extreme weather events like floods and droughts.
