Worksheet: Physical Vs Chemical Changes by Travis Terry | TPT - Free Printable
Educational worksheet: Worksheet: Physical Vs Chemical Changes by Travis Terry | TPT. Download and print for classroom or home learning activities.
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Step-by-step solution for: Worksheet: Physical Vs Chemical Changes by Travis Terry | TPT
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Show Answer Key & Explanations
Step-by-step solution for: Worksheet: Physical Vs Chemical Changes by Travis Terry | TPT
To solve the problem, we need to identify whether each activity listed in the image represents a physical change or a chemical change. Here's a breakdown of each item:
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1. Physical Change: A change in which the physical properties (e.g., shape, size, state) of a substance are altered, but its chemical composition remains unchanged.
2. Chemical Change: A change in which one or more substances are transformed into entirely new substances with different chemical properties.
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1. A pencil breaking in half
- Explanation: Breaking a pencil only changes its shape and size; no new substances are formed.
- Type: Physical Change
2. Iron rusting (changing into rust)
- Explanation: Rusting is a chemical reaction where iron reacts with oxygen and water to form iron oxide (rust). This creates a new substance.
- Type: Chemical Change
3. Mixing baking soda and vinegar to cause the bubbling and fizzing
- Explanation: Baking soda (sodium bicarbonate) reacts with vinegar (acetic acid) to produce carbon dioxide gas, water, and sodium acetate. New substances are formed.
- Type: Chemical Change
4. Folding clothes after they come out of the dryer
- Explanation: Folding clothes only changes their shape; no new substances are created.
- Type: Physical Change
5. When wood burns and you smell smoke
- Explanation: Burning wood involves combustion, where wood reacts with oxygen to form carbon dioxide, water vapor, and other compounds. This is a chemical change.
- Type: Chemical Change
6. Clipping your fingernails
- Explanation: Clipping fingernails only changes their shape; no new substances are formed.
- Type: Physical Change
7. When gasoline in an engine combusts (burns) to create exhaust
- Explanation: Combustion of gasoline involves a chemical reaction with oxygen to produce carbon dioxide, water vapor, and other byproducts. This is a chemical change.
- Type: Chemical Change
8. Changing the shape of a piece of Play-Doh
- Explanation: Changing the shape of Play-Doh only alters its form; no new substances are created.
- Type: Physical Change
9. Adding cooking oil to rice
- Explanation: Adding oil to rice does not involve any chemical reactions; it is simply a mixing process.
- Type: Physical Change
10. The leaves on trees change from green to brown in the Fall
- Explanation: The color change in leaves is due to chemical processes involving the breakdown of chlorophyll and the formation of other pigments. This is a chemical change.
- Type: Chemical Change
11. Melting butter
- Explanation: Melting butter is a phase change from solid to liquid; no new substances are formed.
- Type: Physical Change
12. When milk clumps up from spoiling
- Explanation: Spoiled milk involves bacterial decomposition, which breaks down lactose and proteins into new substances like lactic acid. This is a chemical change.
- Type: Chemical Change
13. A balloon popping
- Explanation: Popping a balloon only changes its shape and structure; no new substances are formed.
- Type: Physical Change
14. Melted sugar turning into caramel
- Explanation: Caramelization is a chemical process where sugar molecules break down and recombine to form new compounds with a distinct flavor and color.
- Type: Chemical Change
15. When the food that you eat digests
- Explanation: Digestion involves chemical reactions where enzymes break down complex molecules into simpler ones (e.g., proteins to amino acids).
- Type: Chemical Change
16. Combining Mentos and Diet Coke to separate the CO₂
- Explanation: This is a chemical reaction where the Mentos catalyze the release of carbon dioxide gas from the Diet Coke. New substances are involved in the process.
- Type: Chemical Change
17. A paper towel absorbing water
- Explanation: Absorbing water is a physical process where the paper towel soaks up water without forming new substances.
- Type: Physical Change
18. Plastic being melted and reshaped
- Explanation: Melting plastic is a phase change from solid to liquid; no new substances are formed.
- Type: Physical Change
19. Wedding a piece of copper
- Explanation: Wedging copper only changes its shape; no new substances are created.
- Type: Physical Change
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Mark "P" for Physical Change and "C" for Chemical Change:
1. P
2. C
3. C
4. P
5. C
6. P
7. C
8. P
9. P
10. C
11. P
12. C
13. P
14. C
15. C
16. C
17. P
18. P
19. P
Boxed Final Answer:
$$
\boxed{\text{P, C, C, P, C, P, C, P, P, C, P, C, P, C, C, C, P, P, P}}
$$
---
Definitions:
1. Physical Change: A change in which the physical properties (e.g., shape, size, state) of a substance are altered, but its chemical composition remains unchanged.
2. Chemical Change: A change in which one or more substances are transformed into entirely new substances with different chemical properties.
---
Analysis of Each Item:
1. A pencil breaking in half
- Explanation: Breaking a pencil only changes its shape and size; no new substances are formed.
- Type: Physical Change
2. Iron rusting (changing into rust)
- Explanation: Rusting is a chemical reaction where iron reacts with oxygen and water to form iron oxide (rust). This creates a new substance.
- Type: Chemical Change
3. Mixing baking soda and vinegar to cause the bubbling and fizzing
- Explanation: Baking soda (sodium bicarbonate) reacts with vinegar (acetic acid) to produce carbon dioxide gas, water, and sodium acetate. New substances are formed.
- Type: Chemical Change
4. Folding clothes after they come out of the dryer
- Explanation: Folding clothes only changes their shape; no new substances are created.
- Type: Physical Change
5. When wood burns and you smell smoke
- Explanation: Burning wood involves combustion, where wood reacts with oxygen to form carbon dioxide, water vapor, and other compounds. This is a chemical change.
- Type: Chemical Change
6. Clipping your fingernails
- Explanation: Clipping fingernails only changes their shape; no new substances are formed.
- Type: Physical Change
7. When gasoline in an engine combusts (burns) to create exhaust
- Explanation: Combustion of gasoline involves a chemical reaction with oxygen to produce carbon dioxide, water vapor, and other byproducts. This is a chemical change.
- Type: Chemical Change
8. Changing the shape of a piece of Play-Doh
- Explanation: Changing the shape of Play-Doh only alters its form; no new substances are created.
- Type: Physical Change
9. Adding cooking oil to rice
- Explanation: Adding oil to rice does not involve any chemical reactions; it is simply a mixing process.
- Type: Physical Change
10. The leaves on trees change from green to brown in the Fall
- Explanation: The color change in leaves is due to chemical processes involving the breakdown of chlorophyll and the formation of other pigments. This is a chemical change.
- Type: Chemical Change
11. Melting butter
- Explanation: Melting butter is a phase change from solid to liquid; no new substances are formed.
- Type: Physical Change
12. When milk clumps up from spoiling
- Explanation: Spoiled milk involves bacterial decomposition, which breaks down lactose and proteins into new substances like lactic acid. This is a chemical change.
- Type: Chemical Change
13. A balloon popping
- Explanation: Popping a balloon only changes its shape and structure; no new substances are formed.
- Type: Physical Change
14. Melted sugar turning into caramel
- Explanation: Caramelization is a chemical process where sugar molecules break down and recombine to form new compounds with a distinct flavor and color.
- Type: Chemical Change
15. When the food that you eat digests
- Explanation: Digestion involves chemical reactions where enzymes break down complex molecules into simpler ones (e.g., proteins to amino acids).
- Type: Chemical Change
16. Combining Mentos and Diet Coke to separate the CO₂
- Explanation: This is a chemical reaction where the Mentos catalyze the release of carbon dioxide gas from the Diet Coke. New substances are involved in the process.
- Type: Chemical Change
17. A paper towel absorbing water
- Explanation: Absorbing water is a physical process where the paper towel soaks up water without forming new substances.
- Type: Physical Change
18. Plastic being melted and reshaped
- Explanation: Melting plastic is a phase change from solid to liquid; no new substances are formed.
- Type: Physical Change
19. Wedding a piece of copper
- Explanation: Wedging copper only changes its shape; no new substances are created.
- Type: Physical Change
---
Final Answer:
Mark "P" for Physical Change and "C" for Chemical Change:
1. P
2. C
3. C
4. P
5. C
6. P
7. C
8. P
9. P
10. C
11. P
12. C
13. P
14. C
15. C
16. C
17. P
18. P
19. P
Boxed Final Answer:
$$
\boxed{\text{P, C, C, P, C, P, C, P, P, C, P, C, P, C, C, C, P, P, P}}
$$
Parent Tip: Review the logic above to help your child master the concept of chemical change vs physical change worksheet.
