"Is It Chemical? — Identify activities involving chemical change in this educational worksheet."

Problem Description:

The task is to identify which activities in the provided images represent chemical changes and mark them by coloring the circle under each corresponding image. A chemical change involves a transformation where new substances are formed, often accompanied by energy changes (e.g., heat, light, gas release).

Solution Approach:

1. Understand Chemical Changes:
- Chemical changes involve the breaking and forming of chemical bonds, resulting in the creation of new substances.
- Examples include burning, rusting, cooking, explosions, and reactions that produce gases or light.

2. Analyze Each Image:
- For each image, determine whether it depicts a chemical change or a physical change.
- Physical changes involve changes in state or form without the formation of new substances (e.g., cutting, melting, mixing).

3. Mark the Circles:
- Color the circle under the images that show chemical changes.

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Analysis of Each Image:

#### Row 1:
1. Image 1: A bottle shattering.
- Explanation: This is a physical change because the glass breaks into pieces but no new substance is formed.
- Action: Do not color the circle.

2. Image 2: Fire burning.
- Explanation: This is a chemical change because combustion involves the reaction of oxygen with fuel, producing new substances like carbon dioxide and water.
- Action: Color the circle.

3. Image 3: A pear being cut.
- Explanation: This is a physical change because the pear is simply being divided into pieces without any new substances being formed.
- Action: Do not color the circle.

#### Row 2:
4. Image 4: A light bulb turning on.
- Explanation: This is a physical change because electricity flows through the filament, causing it to glow, but no new substances are formed.
- Action: Do not color the circle.

5. Image 5: Paper being shredded.
- Explanation: This is a physical change because the paper is being torn into smaller pieces without any new substances being formed.
- Action: Do not color the circle.

6. Image 6: Wood being sawed.
- Explanation: This is a physical change because the wood is being cut into smaller pieces without any new substances being formed.
- Action: Do not color the circle.

#### Row 3:
7. Image 7: Whisking ingredients in a bowl.
- Explanation: This is a physical change because the ingredients are being mixed together, but no new substances are formed.
- Action: Do not color the circle.

8. Image 8: Hair being cut.
- Explanation: This is a physical change because the hair is being trimmed into shorter pieces without any new substances being formed.
- Action: Do not color the circle.

9. Image 9: Fireworks exploding.
- Explanation: This is a chemical change because fireworks involve chemical reactions that produce light, sound, and new substances.
- Action: Color the circle.

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Final Answer:

- Color the circles under Image 2 (fire burning) and Image 9 (fireworks exploding).

Boxed Answer:
\[
\boxed{\text{Images 2 and 9}}
\]