Problem Explanation:
The task is to identify whether each process described in the worksheet represents a
physical change or a
chemical change.
-
Physical Change: A change in which the substance's physical properties (e.g., shape, size, state) are altered, but its chemical composition remains the same.
-
Chemical Change: A change in which the substance undergoes a chemical reaction, resulting in the formation of new substances with different chemical properties.
Solution:
#### 1.
Ice melting to water
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Description: Ice (solid water) changes into liquid water.
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Analysis: This is a
physical change because the substance (water) remains the same; only its state changes from solid to liquid.
-
Answer:
P
#### 2.
Chocolate ice cream melting to liquid cream
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Description: Chocolate ice cream (a frozen mixture) melts into a liquid form.
-
Analysis: This is a
physical change because the components of the ice cream (chocolate, cream, etc.) remain unchanged; only the state changes from solid to liquid.
-
Answer:
P
#### 3.
Paper is shredded
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Description: Paper is torn into smaller pieces.
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Analysis: This is a
physical change because the paper is simply being cut into smaller fragments; its chemical composition remains the same.
-
Answer:
P
#### 4.
White bread is toasted in the toaster
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Description: White bread is heated until it turns brown and crispy.
-
Analysis: This is a
chemical change because the heating process causes the sugars in the bread to undergo a chemical reaction called
caramelization, resulting in the formation of new compounds that give the bread its brown color and distinct flavor.
-
Answer:
C
#### 5.
Vegetables are chopped up and made into a salad
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Description: Vegetables are cut into smaller pieces and mixed together to make a salad.
-
Analysis: This is a
physical change because the vegetables are simply being cut and rearranged; their chemical composition remains unchanged.
-
Answer:
P
Final Answers:
1.
P
2.
P
3.
P
4.
C
5.
P
Boxed Final Answer:
\[
\boxed{P, P, P, C, P}
\]
Parent Tip: Review the logic above to help your child master the concept of chemical change vs physical change worksheet.
