Free Printable Physical and Chemical Changes Worksheets - Free Printable

The image presents a grid of 20 different processes or actions, each illustrated with an image and a brief description. The task likely involves classifying these processes as either physical changes or chemical changes.

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🔬 Understanding the Concepts:

- Physical Change: A change in which the substance's form or state changes, but its chemical composition remains the same. No new substances are formed.
- Examples: cutting, melting, freezing, dissolving, boiling (without decomposition), etc.

- Chemical Change: A change in which one or more new substances are formed due to a chemical reaction. Often involves color change, gas production, temperature change, or irreversible transformation.
- Examples: burning, rusting, cooking, digestion, etc.

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✔ Classification of Each Process

Let’s go through each one:

| Image | Process | Type of Change | Reason |
|------|--------|----------------|-------|
| 🍎 | Cutting an apple | Physical | Only size/shape changes; no new substance formed. |
| 🍪 | Baking a cookie | Chemical | Heat causes chemical reactions (browning, setting). |
| 🔥 | Lighting a match | Chemical | Combustion occurs, producing heat, light, and new substances. |
| ❄️ | Melting ice | Physical | Water changes from solid to liquid; H₂O remains H₂O. |
| 🍽️ | Roasting a marshmallow | Chemical | Browning and charring involve combustion and Maillard reaction. |
| 🧊 | Freezing water | Physical | Phase change from liquid to solid. |
| 🕯️ | Burning a candle | Chemical | Wax combusts to produce CO₂, water vapor, and light. |
| 🍴 | Dissolving sugar | Physical | Sugar molecules disperse in water but remain chemically unchanged. |
| 📄 | Ripping paper | Physical | Only shape changes; no new substances. |
| 🍞 | Slicing bread | Physical | Just cutting; no chemical change. |
| 🫖 | Boiling water | Physical | Liquid to gas phase change; no new substance. |
| 🥤 | Crushing a can | Physical | Shape changes, but material is still aluminum. |
| 🪞 | Breaking a mirror | Physical | Shattering glass—no chemical change. |
| 🍃 | A decaying leaf | Chemical | Decomposition by microbes produces new substances (e.g., soil). |
| 🍳 | Frying an egg | Chemical | Proteins denature and coagulate—permanent change. |
| 🧪 | Mixing vinegar and baking soda | Chemical | Produces CO₂ gas (fizzing)—a new substance forms. |
| 🚲 | A rusting bike | Chemical | Iron reacts with oxygen to form iron oxide (rust). |
| 🔥 | Burning wood | Chemical | Combustion produces ash, CO₂, and water vapor. |
| 🌱 | Cutting grass | Physical | Grass is cut; no chemical alteration. |
| 🍽️ | Digesting food | Chemical | Enzymes break down food into simpler molecules (e.g., glucose). |

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✔ Final Answer:

Here’s the classification:

#### Physical Changes (11):
- Cutting an apple
- Melting ice
- Freezing water
- Dissolving sugar
- Ripping paper
- Slicing bread
- Boiling water
- Crushing a can
- Breaking a mirror
- Cutting grass
- Mixing vinegar and baking soda? ⚠️ Wait! This one is chemical, see below.

Wait — let’s double-check "Mixing vinegar and baking soda":
- It produces carbon dioxide gas → Chemical change.

So correction:

#### Physical Changes (10):
- Cutting an apple
- Melting ice
- Freezing water
- Dissolving sugar
- Ripping paper
- Slicing bread
- Boiling water
- Crushing a can
- Breaking a mirror
- Cutting grass

#### Chemical Changes (10):
- Baking a cookie
- Lighting a match
- Roasting a marshmallow
- Burning a candle
- A decaying leaf
- Frying an egg
- Mixing vinegar and baking soda
- A rusting bike
- Burning wood
- Digesting food

✔ So 10 physical, 10 chemical changes.

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📌 Summary:

The task is likely to sort these 20 processes into two categories: Physical Changes and Chemical Changes.

You can now group them accordingly.

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🧩 Bonus: How to Remember?

- Physical changes = "Just changing form" (cut, melt, freeze, dissolve).
- Chemical changes = "New stuff made" (burn, rot, digest, rust, cook).

Let me know if you'd like this formatted as a table or printable chart!