Worksheet for identifying physical and chemical changes, featuring illustrations and descriptive phrases to be colored according to change type.

Let's solve this worksheet step by step.

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Objective:

Color the examples of physical changes in red and chemical changes in blue.

We need to identify whether each image represents a physical change or a chemical change based on the clues provided in the chart.

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🔍 Definitions:

- Physical Change: A change in which no new substance is formed, only the form, shape, or state changes. These are often reversible.
- Examples: cutting paper, melting ice, boiling water.

- Chemical Change: A change in which a new substance is formed. Often involves color change, gas production, heat release, or cannot be reversed.
- Examples: burning wood, rusting iron, cooking food.

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Now let’s go through each cell and determine if it's physical (red) or chemical (blue).

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🔹 Row 1:

| Cell | Image/Text | Type | Reason |
|------|------------|------|--------|
| 1 | "no new substance is formed" | Physical (Red) | Definition of physical change |
| 2 | Scissors cutting paper | Physical (Red) | Paper is cut — no new substance |
| 3 | Kettle boiling water | Physical (Red) | Water turns to steam — phase change, reversible |
| 4 | Glass with bubbles (effervescence) | Chemical (Blue) | Bubbles suggest gas formation → likely chemical reaction |
| 5 | Glue being applied | Physical (Red) | Glue is spread — no new substance yet |

> ✔ Note: The glue may not be reacting yet — just being applied. So it's physical.

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🔹 Row 2:

| Cell | Image/Text | Type | Reason |
|------|------------|------|--------|
| 1 | Hands bending a metal rod | Physical (Red) | Shape change — no new substance |
| 2 | Ice cubes melting in glass | Physical (Red) | Melting — solid to liquid, reversible |
| 3 | "only a shape change" | Physical (Red) | Definition of physical change |
| 4 | Eggs frying in pan | Chemical (Blue) | Cooking eggs — proteins denature, new substance formed |
| 5 | Lit match | Chemical (Blue) | Burning — combustion, new substances form |

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🔹 Row 3:

| Cell | Image/Text | Type | Reason |
|------|------------|------|--------|
| 1 | Whisking ingredients in bowl | Physical (Red) | Mixing — no reaction yet |
| 2 | Campfire burning logs | Chemical (Blue) | Combustion — produces ash, CO₂, etc. |
| 3 | Knife slicing bread | Physical (Red) | Just cutting — no chemical change |
| 4 | "can be reversed" | Physical (Red) | Clue that describes physical change |
| 5 | Broken eggshell | Physical (Red) | Cracking — no new substance |

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🔹 Row 4:

| Cell | Image/Text | Type | Reason |
|------|------------|------|--------|
| 1 | "a solid is formed" | Chemical (Blue) | This suggests precipitation or crystallization — could be chemical |
| 2 | Kettle with boiling water | Physical (Red) | Same as earlier — phase change |
| 3 | Ice cube melting into water | Physical (Red) | Solid to liquid — physical change |
| 4 | Arrow pointing to broken toy | Physical (Red) | Breaking — no new substance |
| 5 | "can't be reversed" | Chemical (Blue) | Clue for chemical change |

> ✔ "A solid is formed" — if it's due to a reaction (like precipitation), it's chemical. But if it's freezing, it's physical. Here, it's paired with "can't be reversed", so likely chemical.

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🔹 Row 5:

| Cell | Image/Text | Type | Reason |
|------|------------|------|--------|
| 1 | Spoon stirring sugar in water | Physical (Red) | Dissolving — no new substance; can be reversed by evaporation |
| 2 | "a new substance is formed" | Chemical (Blue) | Definition of chemical change |
| 3 | Banana peel turning brown | Chemical (Blue) | Browning = oxidation — chemical change |
| 4 | Fireworks exploding | Chemical (Blue) | Explosion → rapid chemical reaction |
| 5 | Flask with bubbling liquid | Chemical (Blue) | Bubbling indicates gas — chemical reaction |

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✔ Final Classification:

#### 🔴 Physical Changes (Color in Red):

- Cutting paper
- Boiling water (kettle)
- Glue being applied
- Bending metal rod
- Melting ice
- Only a shape change
- Whisking ingredients
- Slicing bread
- Can be reversed
- Broken eggshell
- Boiling water (again)
- Ice melting
- Broken toy
- Stirring sugar in water

#### 🔵 Chemical Changes (Color in Blue):

- Bubbles in glass (effervescence)
- Frying eggs
- Lit match
- Burning logs
- A solid is formed (if irreversible)
- Can’t be reversed
- Banana browning
- Fireworks
- Bubbling flask
- “A new substance is formed”

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📌 Summary Table:

| Image / Text | Color |
|--------------|-------|
| Cutting paper | 🔴 |
| Boiling water (kettle) | 🔴 |
| Bubbles in glass | 🔵 |
| Glue being applied | 🔴 |
| Bending metal | 🔴 |
| Melting ice | 🔴 |
| Only a shape change | 🔴 |
| Frying eggs | 🔵 |
| Lit match | 🔵 |
| Whisking ingredients | 🔴 |
| Burning logs | 🔵 |
| Slicing bread | 🔴 |
| Can be reversed | 🔴 |
| Broken eggshell | 🔴 |
| A solid is formed | 🔵 |
| Boiling water (kettle again) | 🔴 |
| Ice melting | 🔴 |
| Broken toy | 🔴 |
| Can’t be reversed | 🔵 |
| Stirring sugar | 🔴 |
| A new substance formed | 🔵 |
| Banana browning | 🔵 |
| Fireworks | 🔵 |
| Bubbling flask | 🔵 |

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✔ Final Answer:

- Color all physical changes (no new substance, shape change, reversible, etc.) in RED
- Color all chemical changes (new substance, can’t reverse, fire, explosion, etc.) in BLUE

This includes:
- Red (Physical): Cutting, boiling, melting, bending, slicing, stirring, breaking, mixing.
- Blue (Chemical): Burning, frying, fireworks, bubbling reactions, browning, irreversible changes.

Let me know if you'd like a printable version with colors filled in!