Laboratory safety worksheet with hazard symbols and their meanings for science education.

Let's solve Activity 1.1: Laboratory Safety from the worksheet step by step.

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🔍 Task Overview

You are asked to match each hazard symbol on the left with its correct hazard description on the right.

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✔ Step-by-Step Matching

We’ll go through each symbol and match it with the appropriate hazard:

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#### 1. Symbol: Explosion (Explosive)
- Image: A bomb with lines radiating outward (like an explosion).
- Correct Match:
➤ Explosive – *The substance reacts violently when heated or struck.*

✔ Match: Symbol 1 → Explosive

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#### 2. Symbol: Flame
- Image: A flame.
- Correct Match:
➤ Flammable – *The substance catches fire easily.*

✔ Match: Symbol 2 → Flammable

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#### 3. Symbol: Big "X" (Cross)
- Image: A large black "X".
- Correct Match:
➤ Corrosive – *The substance corrodes (eats away) other substances.*
*(Note: The "X" symbol is often used for corrosive materials in some systems, especially older ones.)*

✔ Match: Symbol 3 → Corrosive

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#### 4. Symbol: Three-bladed radiation sign
- Image: A trefoil (three-leafed) symbol — classic radioactive symbol.
- Correct Match:
➤ Radioactive – *The substance emits harmful radiation.*

✔ Match: Symbol 4 → Radioactive

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#### 5. Symbol: Skull and Crossbones
- Image: A skull with crossbones.
- Correct Match:
➤ Toxic – *The substance is harmful in small doses.*

✔ Match: Symbol 5 → Toxic

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#### 6. Symbol: Liquid dripping onto hand and surface
- Image: A liquid droplet falling onto a hand and surface, causing damage.
- Correct Match:
➤ Irritant – *The substance produces vapours or fumes that irritate the eyes, nose and throat.*

✔ Match: Symbol 6 → Irritant

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#### 7. Symbol: Biohazard (three interlocking circles)
- Image: The biohazard symbol (a circle with three curved blades).
- Correct Match:
➤ Biohazardous – *A poisonous substance of biological nature.*

✔ Match: Symbol 7 → Biohazardous

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📌 Final Answers (Matching):

| Symbol | Hazard |
|-------|--------|
| 1. Explosion | Explosive |
| 2. Flame | Flammable |
| 3. X | Corrosive |
| 4. Radiation Trefoil | Radioactive |
| 5. Skull & Crossbones | Toxic |
| 6. Dripping liquid on hand | Irritant |
| 7. Biohazard symbol | Biohazardous |

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💡 Summary:

This activity helps students recognize common laboratory hazard symbols and understand what each one means. It’s crucial for safety in science labs to know these symbols so you can handle chemicals properly and avoid accidents.

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✔ Completed Task: All symbols have been correctly matched to their hazards. You can now draw lines connecting them accordingly on the worksheet.

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