On plain paper, water spreads. On crayon-colored paper, water stays on the surface. This is because wax makes the surface waterproof, showing how some leaves and surfaces repel water to protect themselves. Class 5 Environmental Studies Grade 5 Chapter 1 Water-The ...
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Clouds form when water evaporates, rises as vapour, and cools down. The vapour turns into tiny droplets and gathers together in the air. These droplets form clouds that later cause rain or snow. Class 5 Environmental Studies Grade 5 Chapter 1 ...