Physical vs. Chemical Changes
Flashcard
•
Science
•
4th Grade
•
Practice Problem
•
Hard
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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 ice, boiling water, and breaking glass.
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. Examples include rusting iron, burning wood, and baking a cake.
3.
FLASHCARD QUESTION
Front
Can you give an example of a physical change?
Back
An example of a physical change is freezing water to make ice.
4.
FLASHCARD QUESTION
Front
Can you give an example of a chemical change?
Back
An example of a chemical change is the reaction of vinegar and baking soda, which produces carbon dioxide gas.
5.
FLASHCARD QUESTION
Front
What happens to the molecules during a physical change?
Back
During a physical change, the molecules may change their arrangement or state (like solid, liquid, gas) but their chemical structure remains the same.
6.
FLASHCARD QUESTION
Front
What happens to the molecules during a chemical change?
Back
During a chemical change, the molecules rearrange to form new substances with different chemical properties.
7.
FLASHCARD QUESTION
Front
Is dissolving sugar in water a physical or chemical change?
Back
Dissolving sugar in water is a physical change because the sugar can be recovered by evaporating the water.
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