Physical and Chemical Changes Craftivity - The Owl Teacher - Free Printable

You're correct — this worksheet asks students to identify physical vs. chemical changes and color them red (physical) or blue (chemical).

Let’s break down each image and text box with a clear explanation so you can confidently color the chart.

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## 🔑 Key Definitions:

- Physical Change:
➤ No new substance is formed.
➤ Usually reversible.
➤ Changes in shape, size, state (solid/liquid/gas), or dissolving.

- Chemical Change:
➤ A new substance is formed.
➤ Usually irreversible.
➤ Often involves heat, light, gas, color change, or odor.

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# ✔ Let's Go Row by Row:

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## 🟦 ROW 1: “no new substance is formed”

This is the definition of a physical change → Color these images RED.

1. Scissors cutting paper → RED

➤ Cutting changes shape only. No new substance.

2. Toaster toasting bread → BLUE

➤ Toasting creates new substances (browning = Maillard reaction). Irreversible.

3. Fizzing drink (like soda) → BLUE

➤ Bubbles = carbon dioxide gas released — chemical reaction (decomposition of carbonic acid).

4. Glue bottle squeezing glue → RED

➤ Just changing shape/location of glue. No new substance.

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## 🟦 ROW 2:

1. Hands bending handlebars → RED

➤ Shape change only. Physical.

2. Ice cubes melting in glass → RED

➤ Solid → liquid. Still water. Reversible.

3. “only a shape change” → This is a definition → Color the *box* RED (since it describes physical change)

4. Frying eggs → BLUE

➤ Egg proteins denature and coagulate — new substances formed. Irreversible.

5. Match lighting → BLUE

➤ Combustion = chemical reaction. New substances (ash, smoke, CO₂).

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## 🟦 ROW 3:

1. Mixing batter → RED

➤ Just combining ingredients. No cooking yet — physical mixture.

2. Campfire burning wood → BLUE

➤ Combustion — wood turns to ash, smoke, CO₂. New substances.

3. Knife slicing bread → RED

➤ Cutting = shape change only.

4. “can be reversed” → Definition of physical change → Color box RED

5. Crumpling paper → RED

➤ Shape change only. Can be smoothed out.

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## 🟦 ROW 4:

1. “a solid is formed” → Could be either, but context matters.

➤ In science, if a solid forms from a liquid (e.g., freezing), it’s physical.
➤ If it’s a precipitate from a reaction, it’s chemical.
➤ BUT — look at the image next to it: kettle boiling → that’s water turning to steam → physical.
➤ So this row likely refers to freezing or condensation → RED

2. Kettle boiling → RED

➤ Liquid → gas. Still water. Physical.

3. Ice cube melting → RED

➤ Again, phase change. Physical.

4. Toy car being broken → RED

➤ Shape/structure change. No new substance.

5. “can’t be reversed” → Definition of chemical change → Color box BLUE

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## 🟦 ROW 5:

1. Spoon adding powder to water (dissolving) → RED

➤ Sugar/salt dissolving = physical change. Can be recovered by evaporation.

2. “a new substance is formed” → Definition of chemical change → Color box BLUE

3. Banana ripening → BLUE

➤ Enzymes break down starches into sugars — new substances. Irreversible.

4. Fireworks exploding → BLUE

➤ Chemical reactions producing light, sound, gas. New substances.

5. Hourglass sand falling → RED

➤ Just movement/gravity. No chemical change.

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# 🎨 Final Coloring Guide (by cell):

> Color RED for Physical Change | BLUE for Chemical Change

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## 📊 Grid Coloring Summary (Row x Column):

| Row \ Col | 1 (Text) | 2 (Scissors) | 3 (Toaster) | 4 (Fizzing Drink) | 5 (Glue) |
|-----------|------------------|--------------|-------------|-------------------|----------|
| 1 | RED | RED | BLUE | BLUE | RED |

| Row \ Col | 1 (Handlebars) | 2 (Ice Melting) | 3 (Text: Shape Change) | 4 (Frying Eggs) | 5 (Match) |
|-----------|----------------|-----------------|------------------------|-----------------|-----------|
| 2 | RED | RED | RED | BLUE | BLUE |

| Row \ Col | 1 (Mixing Batter) | 2 (Campfire) | 3 (Slicing Bread) | 4 (Text: Can Be Reversed) | 5 (Crumpled Paper) |
|-----------|-------------------|--------------|-------------------|---------------------------|--------------------|
| 3 | RED | BLUE | RED | RED | RED |

| Row \ Col | 1 (Text: Solid Formed) | 2 (Boiling Kettle) | 3 (Melting Ice) | 4 (Broken Toy Car) | 5 (Text: Can’t Be Reversed) |
|-----------|------------------------|--------------------|-----------------|--------------------|-----------------------------|
| 4 | RED | RED | RED | RED | BLUE |

| Row \ Col | 1 (Dissolving Powder) | 2 (Text: New Substance) | 3 (Ripening Banana) | 4 (Fireworks) | 5 (Hourglass) |
|-----------|-----------------------|-------------------------|---------------------|---------------|---------------|
| 5 | RED | BLUE | BLUE | BLUE | RED |

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## ✍️ Bonus Tips for Students:

- Look for irreversibility, color/smell/gas production, or burning/cooking → usually chemical.
- Look for cutting, melting, freezing, dissolving, bending → usually physical.
- Text boxes like “no new substance”, “can be reversed” = clues for physical.
- Text boxes like “new substance”, “can’t be reversed” = clues for chemical.

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✔ Now you’re ready to color the worksheet correctly!

Let me know if you’d like a printable answer key or flashcards for review!