An Overview of Class 6 Science Water Worksheets
FAQs on Class 6 Science Water Worksheets
1. What are some frequently asked 1-mark questions from the CBSE Class 6 Science chapter on Water for the 2025-26 exams?
For 1-mark questions, focus on definitions and key terms. Based on previous exam patterns, important questions include:
Define transpiration.
What is the process of converting water vapour into water called?
Name two natural sources of freshwater.
What are droughts?
State one method of water conservation.
2. How should a student answer a 3-mark question on the water cycle to score full marks?
To secure full marks for a question on the water cycle, a student should explain the process in sequential steps. The answer must clearly describe each stage: Evaporation (water turning into vapour due to heat), Condensation (vapour forming clouds), and Precipitation (water returning to Earth as rain or snow). Mentioning collection in water bodies is also important. For a 3-mark question, including a simple, well-labelled diagram is highly recommended as it demonstrates a complete understanding.
3. Explain the process of rainwater harvesting. Why is it considered a crucial practice in modern times?
Rainwater harvesting is the technique of collecting and storing rainwater for future use, rather than letting it run off. The two main methods are:
Rooftop Rainwater Harvesting: Rainwater is collected from rooftops and channelled through pipes into a storage tank or a percolation pit.
Surface Runoff Harvesting: Rainwater flowing on the ground is collected in tanks or reservoirs.
This practice is crucial today because it helps recharge groundwater levels, reduces soil erosion, decreases our dependency on municipal water sources, and provides a sustainable water supply during periods of scarcity.
4. How do floods and droughts represent two extreme consequences of imbalance in the water cycle?
Floods and droughts are two opposite but related outcomes of an imbalanced water cycle. Floods occur when there is excessive precipitation in a short period, causing rivers and lakes to overflow because the ground cannot absorb the water fast enough. Conversely, droughts are the result of a prolonged lack of precipitation, leading to a severe depletion of both surface water and groundwater. Both situations highlight the critical importance of a balanced and regular water cycle for sustaining life and agriculture.
5. Why is water considered essential for the survival of both plants and animals?
Water is vital for all life forms due to its role in fundamental biological processes. In animals, it is required for digestion, transportation of nutrients, regulation of body temperature through sweating, and removal of waste products. In plants, water is a key component for photosynthesis (the process of making food), germination of seeds, and transporting essential minerals from the soil to all parts of the plant.
6. A wet shirt dries faster in the sun than in a shady room. Which key concepts from the Water chapter explain this observation?
This observation is explained by the process of evaporation, which is influenced by heat and air movement. The shirt in the sun dries faster for two main reasons:
Heat: The sun's heat provides energy, causing the water molecules in the wet shirt to move faster and turn into vapour more quickly.
Air Circulation: Open areas usually have more wind, which carries the water vapour away from the shirt, allowing more water to evaporate.
The shirt in the shade experiences less heat and air movement, resulting in a much slower rate of evaporation.
7. If all the water on Earth is part of a continuous cycle, why do we still face the problem of water scarcity?
While the total volume of water on Earth remains constant through the water cycle, water scarcity is a major issue due to several factors. Firstly, over 97% of Earth's water is saline (salty) and not suitable for drinking or farming. Of the remaining freshwater, most is locked in glaciers and ice caps. The accessible freshwater is unevenly distributed across the globe. Scarcity is caused by over-extraction of groundwater, pollution of rivers and lakes, and an increasing population demand. Therefore, the problem is not the amount of water, but its availability and usability.











