Podcast
Questions and Answers
What type of change occurs when crushing a can?
What type of change occurs when crushing a can?
- Chemical Change
- Physical Change (correct)
- Both
- None of the above
What is an example of a physical change involving ice?
What is an example of a physical change involving ice?
Melting Ice
What happens when glass is broken?
What happens when glass is broken?
Breaking Glass
Burning wood is a chemical change.
Burning wood is a chemical change.
Rusting iron can be reversed.
Rusting iron can be reversed.
What is a chemical change that happens during cooking?
What is a chemical change that happens during cooking?
What type of changes occur while a candle burns?
What type of changes occur while a candle burns?
Flashcards
What is a physical change?
What is a physical change?
A change that alters the form or appearance of a substance but does not change it into a new substance.
Melting Ice
Melting Ice
The process of solid ice turning into liquid water.
Breaking Glass
Breaking Glass
The shattering of glass into smaller pieces.
What is a chemical change?
What is a chemical change?
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Rusting Iron
Rusting Iron
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Cooking an Egg
Cooking an Egg
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Candle Burning
Candle Burning
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Study Notes
Physical Change
- Crushing a can alters its shape but not its composition, demonstrating a physical change.
- Melting ice results in water, a reversible change that retains the chemical properties of H2O.
- Breaking glass modifies its shape without affecting the chemical structure, categorizing it as a physical change.
Chemical Change
- Burning wood produces ash and gases, a process that cannot revert to the original wood, marking it as a chemical change.
- Rusting iron forms iron oxide, a new substance that cannot be converted back to iron, signifying a chemical change.
- Cooking an egg transforms its proteins, creating a permanent change where the original egg cannot be restored.
Multiple Part Change
- Burning a candle exemplifies both physical and chemical changes: melting wax is physical, while the combustion of the wick is chemical.
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