A snowflake is frozen water. When heat is added, the snowflake melts and changes state to become liquid water.
Water can exist as a solid (ice), liquid (water) or gas (vapour or gas). Adding heat can cause ice (a...
Observing and asking questions are essential parts of what a scientist does. Through their observations, scientists try to build more...
Looking down at the Earth from space, you can get an idea of just how much water there is. In...
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