Exercise 1.1 (laboratory safety rules part 1) worksheet | Live ... - Free Printable

Let's solve the worksheet "Exercise 1.1: Laboratory Safety Rules (Part 1)" step by step and explain each answer.

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Question 1:

#### a) Based on the figure above, state THREE (3) unsafe practices shown by the students.

Looking at the image, we can observe several unsafe behaviors:

1. Running or jumping in the laboratory
→ One student is jumping over a chair, which is dangerous because it can cause accidents, especially when chemicals or glassware are present.

2. Eating or drinking in the lab
→ A student is seen eating food while in the lab. This is unsafe because food can become contaminated with chemicals, and it increases the risk of ingestion of harmful substances.

3. Spilling chemicals or liquids on the table
→ There is a spilled liquid on the workbench, possibly from a beaker or bottle. Spills can lead to chemical reactions, burns, or slips.

> ✔ Answer:
> 1. Running or jumping in the laboratory
> 2. Eating or drinking in the lab
> 3. Spilling chemicals on the bench

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#### b) State TWO (2) rules in the science laboratory

These are general safety rules that should be followed in any science lab:

1. Always wear protective clothing such as a lab coat and safety goggles.
→ This protects your body and eyes from chemical splashes or spills.

2. Do not eat or drink in the laboratory.
→ Food and drinks can become contaminated with hazardous substances.

> ✔ Answer:
> 1. Wear a lab coat and safety goggles
> 2. Do not eat or drink in the laboratory

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Question 2: Make a (Y) to the CORRECT laboratory rules and a cross (N) to the wrong ones.

Let’s analyze each statement:

a) Do not eat or drink in a laboratory
→ ✔ Correct – This is a standard safety rule.
→ Answer: (Y)

b) Do not wear a laboratory coat to protect the body
→ ✘ Incorrect – You should wear a lab coat to protect your clothes and skin.
→ Answer: (N)

c) Wear safety goggles if there is a risk to the eyes
→ ✔ Correct – Safety goggles are essential when working with chemicals, flames, or glassware.
→ Answer: (Y)

d) Know what to do if there is a fire
→ ✔ Correct – Knowing emergency procedures like using a fire extinguisher or fire alarm is vital.
→ Answer: (Y)

e) Always do what the teacher tells you to do
→ ✔ Correct – Following instructions ensures safety and proper procedure.
→ Answer: (Y)

> ✔ Final Answers for Question 2:
> a) (Y)
> b) (N)
> c) (Y)
> d) (Y)
> e) (Y)

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✔ Final Answer Summary:

#### Question 1a): Unsafe Practices
1. Running or jumping in the laboratory
2. Eating or drinking in the lab
3. Spilling chemicals on the bench

#### Question 1b): Lab Rules
1. Wear a lab coat and safety goggles
2. Do not eat or drink in the laboratory

#### Question 2: True/False
a) (Y)
b) (N)
c) (Y)
d) (Y)
e) (Y)

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This worksheet emphasizes laboratory safety, and understanding these rules helps prevent accidents and promotes responsible behavior in scientific environments. Always follow safety guidelines! 🔬🛡️