Science Project

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  • Brushing your teeth is a chemical change because the toothpaste removes bacteria from your teeth by the chemicals in the toothpaste eating through the bacteria and plaque
  • Dropping a plate is a physical change because the molecules stay the same and it just cracks the plate
  • Lightning striking a tree is a chemical change because the burning changes some of the wood to ash and charred wood
  • pouring molten metal into molds and letting it cool is a physical change because the molecules weren't changed only the state of matter was
  • rotting fruit is a chemical change because the fruit is changing to rotten fruit molecules
  • shaking soda and opening it is a physical change because it bubbles and is releasing the carbonation into the air but no molecules are changed
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