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Reversible and Irreversible Changes in Matter

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5 Questions

What type of change is cutting a piece of paper into pieces?

Irreversible change

Which action showcases reversible changes in matter?

Melting ice

What happens when rusting occurs on iron?

It becomes irreversible

Which process causes irreversible changes in an egg?

Cooking the raw egg

What type of change is heating ice until it turns into water?

Reversible change

Study Notes

  • Modeling clay can be transformed into different shapes through actions like pushing, pulling, or twisting, and can also be rolled back into its original shape, showcasing reversible changes in matter.
  • Heating ice causes it to melt into water, known as melting, and cooling the water turns it back into solid ice, known as freezing, demonstrating reversible changes in matter.
  • Cooking a raw egg turns it from liquid to solid, with the change being irreversible even if it cools down.
  • Cutting a piece of paper is an irreversible change as the pieces cannot be turned back into a whole paper.
  • Burning paper turns it into ash, which cannot be transformed back into paper, showcasing another irreversible change. Rusting iron when it reacts with water and oxygen is also irreversible, as rust cannot be changed back into iron.

Explore the concepts of reversible and irreversible changes in matter through examples like melting ice, molding clay, cooking eggs, cutting paper, and burning paper. Learn how certain changes can be undone while others are permanent.

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