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The Water Cycle Video Lecture | Our Wondrous World Class 5 - New NCERT
FAQs on The Water Cycle Video Lecture - Our Wondrous World Class 5 - New NCERT
| 1. What is the water cycle and why is it important? |  |
Ans. The water cycle, also known as the hydrological cycle, is the continuous process through which water circulates in the Earth's atmosphere, land, and bodies of water. It involves several key processes: evaporation (where water turns into vapor), condensation (where vapor forms clouds), precipitation (where water falls back to the ground as rain, snow, or hail), and collection (where water gathers in rivers, lakes, and oceans). This cycle is essential because it helps regulate the Earth's climate, supports plant and animal life, and replenishes freshwater sources.
| 2. What are the main stages of the water cycle? | |
Ans. The main stages of the water cycle include evaporation, condensation, precipitation, and collection. During evaporation, water from oceans, rivers, and lakes turns into vapor due to heat from the sun. The vapor then cools and condenses to form clouds. When the clouds become heavy enough, precipitation occurs, resulting in rain, snow, or hail. Finally, the water collects in various bodies such as rivers, lakes, and oceans, where the cycle can begin again.
| 3. How does human activity affect the water cycle? | |
Ans. Human activities can significantly impact the water cycle. For example, urbanization can increase the amount of impervious surfaces, leading to more runoff and less water soaking into the ground. Deforestation can reduce transpiration (the release of water vapor from plants), affecting local precipitation patterns. Additionally, pollution can contaminate water sources, impacting the quality of water available for evaporation and precipitation. Climate change, driven by human activities, also influences temperature and weather patterns, altering the natural cycle.
| 4. What are some examples of precipitation in the water cycle? | |
Ans. Precipitation occurs when water droplets in clouds become too heavy and fall back to the Earth. Common examples include rain, snow, sleet, and hail. Rain is liquid water that falls when temperatures are above freezing, while snow consists of ice crystals that form in cold conditions. Sleet occurs when raindrops freeze before hitting the ground, and hail forms in strong thunderstorms when updrafts carry droplets upward, causing them to freeze and accumulate layers.
| 5. Why is the water cycle crucial for agriculture? | |
Ans. The water cycle is crucial for agriculture because it provides the necessary water for crops to grow. Precipitation replenishes soil moisture and fills water sources used for irrigation. The cycle also helps maintain the balance of nutrients in the soil, as water carries essential minerals to plants. Understanding the water cycle allows farmers to manage water resources effectively, ensuring sustainable agricultural practices and food security.
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