The Water Cycle. expectations. Students will be able to recognize evidence of the water cycle and relate what they have learned to ordinary experiences.
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(Ministry of Education and Training, 1998, The Ontario Curriculum Grades 1-8 Science and Technology).
Precipitation occurs when there is so much water vapour in the air that it cannot be held by the clouds anymore and it falls to the ground in the form of rain, snow, hail or sleet(www.kidszone.ws/water/index.html).
Evaporation occurs when the sun heats up water and turns it into vapour or steam. The water vapour leaves bodies of water, i.e., lakes, rivers, oceans, puddles etc… and goes into the air.
You can see this in the early morning mist, fog, or steam of a kettle or boiling water on the stove.
When the water vapour in the air gets cold and changes back into liquid and forms clouds.