Melting and Freezing
⭐ MasteredMelting happens when a solid turns into a liquid after it is heated. Freezing is the opposite, when a liquid cools and becomes a solid.
Ice melts at 0 degrees Celsius, which is the freezing point of water.
All about Melting and Freezing
Melting is the change from solid to liquid when a substance is heated. Freezing is the reverse, when a liquid cools and becomes solid.
Water melts and freezes at 0 degrees Celsius, which is why ice forms on ponds in winter.
The heat energy makes the particles in the solid move faster and break away from their fixed positions. The temperature at which a solid melts is called its melting point.
Freezing is the opposite process. When a liquid loses heat, its particles slow down and lock into a fixed arrangement, forming a solid. Water freezes into ice at the same temperature at which ice melts, which is why a freezer makes ice cubes from water.
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Real-life uses of Melting and Freezing
- Making ice cubes and ice lollies
- Salting roads to melt ice
- Understanding how glaciers change
Frequently asked questions about Melting and Freezing
At what temperature does water freeze?
Water freezes at 0 degrees Celsius.
Why do we salt icy roads?
Salt lowers the freezing point of water, so ice melts at lower temperatures.