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Early Learners
The Water Cycle, Evaporation, Condensation, Precipitation
How water moves between sky, land, and sea
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The water cycle is the path water takes as it moves around Earth. Water can travel from oceans, lakes, rivers, plants, and soil into the air, then return to the ground again. This cycle matters because all living things need water to survive, grow, and stay healthy. It also helps explain clouds, rain, snow, puddles, and streams.
Key Facts
- Evaporation happens when liquid water warms up and changes into water vapor.
- Condensation happens when water vapor cools and changes back into tiny liquid droplets.
- Precipitation is water that falls from clouds as rain, snow, sleet, or hail.
- Collection happens when water gathers in oceans, lakes, rivers, puddles, and underground spaces.
- The Sun provides energy for the water cycle by heating water on Earth.
- Simple cycle pattern: evaporation + condensation + precipitation + collection = water cycle
Vocabulary
- Water cycle
- The water cycle is the continuous movement of water between Earth’s surface and the sky.
- Evaporation
- Evaporation is when liquid water changes into an invisible gas called water vapor.
- Condensation
- Condensation is when water vapor cools and changes into tiny drops of liquid water.
- Precipitation
- Precipitation is water that falls from clouds to Earth, such as rain, snow, sleet, or hail.
- Collection
- Collection is when water gathers in places like oceans, lakes, rivers, and puddles after it falls.
Common Mistakes to Avoid
- Thinking clouds are made of smoke is wrong because clouds are made of tiny water droplets or ice crystals.
- Saying evaporation only happens when water boils is wrong because water can slowly evaporate at normal outdoor temperatures.
- Forgetting the Sun’s role is wrong because sunlight gives water the energy it needs to evaporate.
- Thinking the water cycle has a final stop is wrong because water keeps moving through the cycle again and again.
Practice Questions
- 1 A puddle has 10 cups of water in the morning. By afternoon, 3 cups have evaporated. How many cups of water are left in the puddle?
- 2 A rain gauge collects 2 centimeters of rain on Monday and 4 centimeters of rain on Tuesday. How many centimeters of precipitation fell in all?
- 3 On a cool morning, tiny drops of water appear on the outside of a cold glass. Which part of the water cycle does this show, and why?