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

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EXERCISE 1.1: LABORATORY SAFETY RULES (PART 1)

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#### 1. The Figure below shows the behavior of a group of students in a science laboratory.

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

Looking at the illustration:

1. One student is jumping on a chair – This is dangerous because it can lead to falls, injuries, or knocking over equipment.
2. A student is eating food in the lab – Eating in the laboratory is unsafe as chemicals might be spilled or contaminated, leading to ingestion of harmful substances.
3. Chemicals are being spilled and left unattended – Spilled chemicals can cause burns, fires, or toxic exposure if not cleaned up immediately.

> ✔ Answer:
>
> 1. Jumping on a chair
> 2. Eating in the laboratory
> 3. Spilling chemicals and leaving them unattended

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

These should be general safety rules based on proper lab conduct.

> ✔ Answer:
>
> 1. Always wear a laboratory coat and safety goggles when handling chemicals.
> 2. Never eat or drink in the laboratory.

*(Other valid answers could include: Follow teacher instructions, keep the lab area clean, do not touch unknown chemicals, etc.)*

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#### 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 – Food and drinks can become contaminated with chemicals.
→ (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 from spills. Saying "do not wear" is wrong.
→ (N)

c) Wear safety goggles if there is a risk to the eyes
✔ Correct – Safety goggles protect against chemical splashes or flying particles.
→ (Y)

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

e) Always do what the teacher tells you to do
✔ Correct – Teachers give instructions for safety and proper procedure. Following them is vital.
→ (Y)

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

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✔ Summary of Answers:

#### Question 1a: Three unsafe practices
1. Jumping on a chair
2. Eating in the laboratory
3. Spilling chemicals and leaving them unattended

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

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

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This worksheet emphasizes laboratory safety, which is crucial to prevent accidents and ensure a safe learning environment. Always follow rules and use protective gear!