Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
The Water Cycle is the continuous journey that water takes from the Earth's surface to the sky and back again, involving the circulation of molecules.
Evaporation: The process where the Sun's heat changes liquid water from oceans, lakes, and rivers into water vapor ( in its gaseous state).
Condensation: As water vapor rises into the atmosphere, it cools down and turns back into tiny liquid droplets, which cluster together to form clouds.
Precipitation: When cloud droplets combine and become too heavy to stay in the air, they fall back to Earth as rain, snow, sleet, or hail.
Collection: The fallen water gathers in water bodies like oceans and lakes, or soaks into the ground to become groundwater.
Transpiration: A process where plants release vapor into the air through tiny pores in their leaves.
Weather is the day-to-day condition of the atmosphere, influenced significantly by the Sun and the movement of water.
📐Formulae
💡Examples
Problem 1:
After a heavy rain, Rohan noticed a puddle of water in his garden. By afternoon, the puddle had disappeared even though nobody cleaned it. What happened to the water?
Solution:
Evaporation
Explanation:
The heat from the Sun warmed the in the puddle, changing it from a liquid state into a gas called water vapor, which then rose into the air.
Problem 2:
Why do we see 'dew' on grass early in the morning even when it hasn't rained?
Solution:
Condensation
Explanation:
During the cold night, water vapor in the air touches the cool grass. It loses heat and turns back into liquid droplets.
Problem 3:
Identify the three states of water found in the water cycle.
Solution:
Solid (Ice/Snow), Liquid (Rain/Water), and Gas (Water Vapor).
Explanation:
Water is unique because it exists naturally in all three states of matter as it moves through the environment.