© Long ANSWER TYPE QUESTIONS : Answer in 20-25 words
1. Why is natural water not considered to be safe for drinking ?
2. Describe water cycle in nature.
3. What is the importance of water for humans, animals and plants ?
4. What is meant by conservation of water ? Suggest three methods to conserve water.
5. Describe rainwater harvesting.
Answers
Answer:
1.Boiling or disinfecting the water may not make the water safe if it is contaminated with harmful chemicals, including natural metals such as arsenic or lead. The only way to reduce the health risk associated with harmful elements and chemicals is to limit your consumption to smaller quantities or occasional use only
2.The water cycle is a process that re-circulates Earth's water through the stages of evaporation, condensation and collection. The water from lakes, oceans, rivers and other water bodies begins to evaporate; vapor from the water bodies condenses into clouds, later causing precipitation.
3.All animals and plants need water to survive, and the human body is more than three-fourths water. Life-forms use water to carry nutrients around the body and to take away waste. Water also helps break down food and keep organisms cool, among other very important jobs.
4.The three ways to conserve watr are as follow: using bucket and mug instead of shower while bathing. By harvesting the rainwater or rainwater harvesting. by uing a bucket to wash the car instead of using pipe.
5.The harvesting of rainwater simply involves the collection of water from surfaces on which rain falls, and subsequently storing this water for later use. Normally water is collected from the roofs of buildings and stored in rainwater tanks. This is very common in rural Australia.