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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