1. Slide
60 seconds
Salt lowers the freezing point of water, so when it is added to ice, the ice melts. Salt is also a great absorber of heat, which helps to melt ice faster than without the salt. Salt also creates a slushy mixture of ice and water, which reduces friction and helps the ice to melt faster.
Why Does Salt Melt Ice?
2. Word cloud
120 seconds
Name one property of salt that helps it melt ice?
3. Slide
60 seconds
Salt lowers the freezing point of water, which is the temperature at which water turns into ice. It does this by creating a brine solution when it is added to water. This solution has a lower freezing point than pure water. When salt is added to ice, it starts to melt. This is because the salt lowers the freezing point of the water in the ice, causing it to turn into liquid. The melting of ice by salt is an example of a physical change. This means that the salt and ice combine to form a new substance, but neither the salt nor the ice is changed chemically.
Concepts:
4. Poll
60 seconds
Do you think salt is an effective way to melt ice?
- Yes, it works very well
- No, it doesn't work at all
- It works but not as well as other methods
5. Slide
60 seconds
Salt lowers the freezing temperature of water, so adding salt to ice helps the ice melt quicker. Salt helps prevent ice from reforming after it has melted. This is why it's often used on roads to prevent ice from forming during cold weather. Salt draws moisture from the air, which helps it absorb the heat from the ice and helps it melt faster.
Did you know?
6. Drawings
570 seconds
Draw your favorite holiday memory: snow, sun, ice cream, hot chocolate, movies, family, laughter. Get creative and have fun!
7. Open question
300 seconds
What happens when salt is added to ice?
8. Open question
300 seconds
What would happen if salt wasn't added to ice?
9. Personalised Feedback
360 seconds
Why do you think salt is used to melt ice on roads and sidewalks?
10. Open question
300 seconds
How does the melting of ice help to keep our roads safe?
11. Drawings
450 seconds
What are some other ways we can remove snow and ice from the roads?
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