Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Water is the most precious natural resource, often called the 'Elixir of Life', and its chemical formula is .
Nearly of the Earth's surface is covered with water, but only a very small percentage is fresh water available for drinking.
Water exists in three states: Solid (ice), Liquid (water), and Gas (water vapor). These states change through heating or cooling.
The Water Cycle is a continuous process involving Evaporation, Condensation, and Precipitation that circulates between the Earth and the atmosphere.
Water Conservation means using water wisely and avoiding wastage. Methods include turning off taps while brushing and using a bucket instead of a hose to wash cars.
Rainwater Harvesting is a technique used to collect and store rain for future use instead of letting it run off.
Water pollution is caused by throwing waste into rivers and lakes, making the harmful for plants, animals, and humans.
📐Formulae
💡Examples
Problem 1:
If a leaking tap wastes liters of every hour, how much water is wasted in one full day ( hours)?
Solution:
Explanation:
To find the total waste, we multiply the amount of wasted per hour by the total number of hours in a day.
Problem 2:
What happens to liquid when it is kept in a freezer at ?
Solution:
It turns into Ice (Solid).
Explanation:
When water loses heat, it undergoes a process called freezing, changing its state from liquid to solid.
Problem 3:
Briefly explain the process of Rainwater Harvesting.
Solution:
Collecting rain from rooftops and storing it in tanks.
Explanation:
Rainwater harvesting helps in increasing the groundwater level and ensures we have available during dry seasons.