Sprinkling+salt

Challenge 4 - Sprinkling salt
This challenge offers a total of 3 extra points! Read, find out the answers and put in writing your explanation. You can send it to Mr Prado by e-mail or print a hard copy and hand it to Mr Prado. Good luck!

In freezing cold weather, people often sprinkle salt on the sidewalks and roads. What is the salt for? How does this help? //Explain using your knowledge of changes of physical states. //

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