Chemical and Physical Properties and Changes
Flashcard
•
Chemistry
•
7th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A process where substances combine or break apart to form new substances, often accompanied by energy changes, color changes, or gas production.
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, such as changes in state or shape.
3.
FLASHCARD QUESTION
Front
What is a chemical property?
Back
A characteristic of a substance that describes its ability to undergo a specific chemical change, such as reactivity with acids or flammability.
4.
FLASHCARD QUESTION
Front
What is a physical property?
Back
A characteristic of a substance that can be observed or measured without changing its identity, such as color, density, or boiling point.
5.
FLASHCARD QUESTION
Front
What evidence indicates a chemical change?
Back
Signs of a chemical change include color change, gas production, temperature change, and the formation of a precipitate.
6.
FLASHCARD QUESTION
Front
What happens to bonds during a chemical change?
Back
The bonds of the reactants are broken and rearranged to form new products.
7.
FLASHCARD QUESTION
Front
What is reactivity with acid?
Back
A chemical property that describes how a substance reacts when it comes into contact with an acid, often resulting in a chemical change.
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