Physical and Chemical Changes 7th Grade Final
Flashcard
•
Science
•
7th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a physical change?
Back
A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and cutting.
2.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A chemical change is a change that results in the formation of new chemical substances. It involves a change in the chemical composition of the substance. Examples include rusting, burning, and baking.
3.
FLASHCARD QUESTION
Front
What happens to the properties of a substance during a chemical change?
Back
The properties of a substance change during a chemical change, indicating that a new substance has formed.
4.
FLASHCARD QUESTION
Front
What is rusting?
Back
Rusting is a chemical change that occurs when iron reacts with oxygen and moisture in the environment, forming iron oxide (rust).
5.
FLASHCARD QUESTION
Front
Why is cutting paper considered a physical change?
Back
Cutting paper is a physical change because it does not change the chemical composition of the paper, and the paper can be reassembled into its original form.
6.
FLASHCARD QUESTION
Front
What is an example of energy release in a chemical change?
Back
Burning wood is an example of a chemical change that releases energy in the form of heat and light.
7.
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 composition.
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