What is a chemical change?
Chemical Reactions Flashcard

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Science
•
7th - 8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A process where substances combine or break apart to form new substances with different properties.
2.
FLASHCARD QUESTION
Front
What is a physical change?
Back
A change that affects one or more physical properties of a substance without altering its chemical composition.
3.
FLASHCARD QUESTION
Front
What are indicators of a chemical reaction?
Back
Change in temperature, change in color, formation of a precipitate, release of a gas, release of light, change in odor.
4.
FLASHCARD QUESTION
Front
What is a precipitate?
Back
A solid that forms and settles out of a liquid mixture during a chemical reaction.
5.
FLASHCARD QUESTION
Front
What happens during a chemical reaction?
Back
Atoms rearrange to form new substances, breaking and forming chemical bonds.
6.
FLASHCARD QUESTION
Front
What is the law of conservation of mass?
Back
In a chemical reaction, mass is neither created nor destroyed; it remains constant.
7.
FLASHCARD QUESTION
Front
What is an example of a chemical change?
Back
Burning wood, which produces ash, smoke, and gases.
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