What is a physical change?
Review of Physical and Chemical Changes

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Science
•
5th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
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 dissolving.
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 chemical reaction and includes changes such as burning, rusting, and digestion.
3.
FLASHCARD QUESTION
Front
What evidence might indicate a chemical change has occurred?
Back
Evidence of a chemical change may include a change in color, the production of gas (bubbles), the formation of a precipitate, or a change in temperature.
4.
FLASHCARD QUESTION
Front
What happens to the molecules during a physical change?
Back
During a physical change, the arrangement of molecules may change, but the molecules themselves remain the same.
5.
FLASHCARD QUESTION
Front
What happens to the molecules during a chemical change?
Back
During a chemical change, the bonds between molecules are broken and new bonds are formed, resulting in the creation of new substances.
6.
FLASHCARD QUESTION
Front
Can a physical change be reversed?
Back
Many physical changes can be reversed, such as freezing and melting water, but some may not be easily reversible.
7.
FLASHCARD QUESTION
Front
Can a chemical change be reversed?
Back
Most chemical changes are not easily reversible, as they result in the formation of new substances.
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