What is the difference between a physical change and a chemical change?
Physical or Chemical Change

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Science
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5th - 8th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of one or more new substances with different properties.
2.
FLASHCARD QUESTION
Front
What is an example of a chemical change?
Back
Burning wood is an example of a chemical change, as it transforms the wood into ash, smoke, and gases.
3.
FLASHCARD QUESTION
Front
What happens when sodium is placed in water?
Back
Sodium reacts violently with water, resulting in a chemical change that produces sodium hydroxide and hydrogen gas.
4.
FLASHCARD QUESTION
Front
What is an example of a physical change?
Back
Melting ice is an example of a physical change, as it changes from solid to liquid without altering its chemical structure.
5.
FLASHCARD QUESTION
Front
What occurs in an instant ice pack when the chemicals mix?
Back
When the chemicals in an instant ice pack mix, a chemical change occurs, resulting in an endothermic reaction that absorbs heat and causes the pack to become cold.
6.
FLASHCARD QUESTION
Front
What are the signs of a chemical change?
Back
Signs of a chemical change include color change, temperature change, gas production, formation of a precipitate, and change in odor.
7.
FLASHCARD QUESTION
Front
Can a physical change be reversed?
Back
Many physical changes can be reversed, such as freezing and melting, but some may not be easily reversible.
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