Physical And Chemical Changes-Learning About Science, Level | Is ... - Free Printable

Let's solve this worksheet step by step.

Objective:

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

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🔍 Key Definitions:

- Physical Change:
- No new substance is formed.
- Only a change in shape, size, or state (like melting, boiling).
- Can usually be reversed.
- Examples: cutting paper, boiling water, melting ice.

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

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Now let’s go through each image and determine whether it represents a physical or chemical change.

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✔ Step-by-step Analysis:

#### Row 1: "no new substance is formed"
This clue points to physical changes.

1. Scissors cutting paper → Physical (just changing shape) → ✔ Red
2. Kettle boiling water → Water turns to steam (state change) → Physical → ✔ Red
3. Glass with bubbles (maybe dissolving?) → If it's just bubbling without reaction, could be physical (e.g., carbonation), but if it's chemical, like fizzing from reaction, it might be chemical. But here, no indication of new substance → Likely physical → ✔ Red
4. Pouring glue on paper → Glue spreading = physical change (unless drying causes polymerization) → But in context, likely just physical → ✔ Red

> ✔️ All in this row are physical changes → Color all red

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#### Row 2: "only a shape change"
Clearly physical.

5. Bending a metal rod → Shape change → Physical → ✔ Red
6. Ice melting in a glass → Solid to liquid → Physical → ✔ Red
7. Frying eggs in a pan → Eggs cook → Proteins denature → New substances form → ✘ Chemical → Blue
8. Lighted match → Burning → Combustion → Chemical → ✘ Blue

> ⚠️ Wait — the clue says "only a shape change", but two images don’t fit that:
> - Frying eggs → not just shape change → Chemical
> - Lighted match → definitely chemical

So even though the clue says “only a shape change,” we must judge based on the image, not the clue. The clue may be misleading or part of a pattern.

But looking at the layout: each cell has an image and sometimes a label.

Actually, the clues are in some cells, and others have images only.

Let’s re-evaluate by analyzing each image individually, regardless of adjacent text.

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🧩 Better Approach: Analyze Each Image

We’ll go cell by cell:

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#### Column 1 (Leftmost):

1. "no new substance is formed" → This is a label, not an image. So skip for coloring.
2. Bending metal rod → Physical (shape change) → ✔ Red
3. Mixing ingredients in bowl → Whisking batter → Could be physical (mixing), unless baking occurs → But here it's just mixing → Physical → ✔ Red
4. "a solid is formed" → Label → Skip
5. Spoon stirring sugar into water → Dissolving → Physical change (sugar molecules dispersed, no new substance) → ✔ Red

→ All these are physical changes → Red

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#### Column 2:

1. Cutting paper with scissors → Physical → ✔ Red
2. Melting ice in glass → Physical → ✔ Red
3. Campfire (burning logs) → Combustion → Chemical → ✘ Blue
4. Boiling water in kettle → Phase change → Physical → ✔ Red
5. "a new substance is formed" → Label → Skip

→ 3rd image is chemical → Blue, rest are red

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#### Column 3:

1. Electric kettle (boiling water) → Physical → ✔ Red
2. "only a shape change" → Label → Skip
3. Toasting bread → Browning = Maillard reaction → Chemical → ✘ Blue
4. Melting ice cube → Physical → ✔ Red
5. Banana peel turning brown → Enzymatic browning → Chemical → ✘ Blue

→ Toasting and banana → Blue, others → Red

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#### Column 4:

1. Glass with bubbles (possibly effervescent drink) → If CO₂ escaping, it’s physical (gas release), but if from chemical reaction (like Alka-Seltzer), it’s chemical → Here, no clear indicator, but often shown as chemical → Let’s assume chemical → ✘ Blue
- But wait — if it’s just carbonated water, it’s physical (dissolved gas escaping). However, in science education, such images often represent chemical changes when bubbles are shown with reactions.

But look: next one is frying eggs → clearly chemical.

Actually, this one is ambiguous. But since it’s paired with other chemical indicators, let’s consider it chemical → Blue

2. Frying eggs → Cooking → Denaturation of proteins → Chemical → ✘ Blue
3. Can be reversed → Label → Skip
4. Airplane model being built? → Assembling → Physical → ✔ Red
5. Fireworks exploding → Combustion → Chemical → ✘ Blue

→ Most are blue, except airplane → Red

Wait — airplane being assembled? That’s physical → ✔ Red

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#### Column 5:

1. Glue being applied to paper → Physical (application) → ✔ Red
2. Lit match → Burning → Chemical → ✘ Blue
3. Broken eggshell → Shattering → Physical → ✔ Red
4. "can't be reversed" → Label → Skip
5. Flask with bubbles → Likely chemical reaction (e.g., vinegar + baking soda) → Chemical → ✘ Blue

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✔ Final Classification:

Let’s now list each image and its classification:

| Cell | Image Description | Type | Color |
|------|-------------------|------|-------|
| 1 | Cutting paper | Physical | Red |
| 2 | Kettle boiling water | Physical | Red |
| 3 | Glass with bubbles (effervescent?) | Chemical (likely) | Blue |
| 4 | Glue on paper | Physical | Red |
| 5 | Bending metal | Physical | Red |
| 6 | Melting ice | Physical | Red |
| 7 | Frying eggs | Chemical | Blue |
| 8 | Lit match | Chemical | Blue |
| 9 | Mixing ingredients | Physical | Red |
| 10 | Campfire | Chemical | Blue |
| 11 | Toasting bread | Chemical | Blue |
| 12 | Melting ice cube | Physical | Red |
| 13 | Banana peel browning | Chemical | Blue |
| 14 | Airplane model | Physical | Red |
| 15 | Fireworks | Chemical | Blue |
| 16 | Broken eggshell | Physical | Red |
| 17 | Flask with bubbles | Chemical | Blue |

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🔎 Now, apply colors:

#### Color red (Physical Changes):
- Cutting paper
- Boiling water (kettle)
- Glue on paper
- Bending metal
- Melting ice
- Mixing ingredients
- Melting ice cube
- Airplane model
- Broken eggshell

✔ These should be colored red

#### Color blue (Chemical Changes):
- Glass with bubbles (if chemical)
- Frying eggs
- Lit match
- Campfire
- Toasting bread
- Banana peel browning
- Fireworks
- Flask with bubbles

✔ These should be colored blue

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📌 Summary:

- Physical Changes (Red):
- Cutting paper
- Boiling water (kettle)
- Glue on paper
- Bending metal
- Melting ice
- Mixing ingredients
- Melting ice cube
- Airplane model
- Broken eggshell

- Chemical Changes (Blue):
- Glass with bubbles (assume chemical)
- Frying eggs
- Lit match
- Campfire
- Toasting bread
- Banana peel browning
- Fireworks
- Flask with bubbles

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✔ Final Answer:

> Color in red:
> - Cutting paper
> - Boiling water (kettle)
> - Glue on paper
> - Bending metal
> - Melting ice
> - Mixing ingredients
> - Melting ice cube
> - Airplane model
> - Broken eggshell

> Color in blue:
> - Glass with bubbles
> - Frying eggs
> - Lit match
> - Campfire
> - Toasting bread
> - Banana peel browning
> - Fireworks
> - Flask with bubbles

> Note: The labels like "no new substance formed", "can be reversed", etc., are clues and do not need to be colored.

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