Do heated materials always expand?



  1. 0 Votes

    Nope. There’s a class of materials that exhibit negative thermal expansion, an attribute which is said to be caused by their odd molecular structure that tends to twist as it s heated. Also, your muscles may contract when heated in some cases.

    I hope this helped!

  2. 0 Votes

    Also, think of ice melting.  You may know that water expands as it freezes, and the opposite is true as it warms back up.  You may see this when you pour an ice water and let it sit for a while, or observe the expansion if you ever overfill your ice cube trays in the freezer.

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