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

Problem Analysis:

The task involves analyzing a figure depicting students in a science laboratory and identifying unsafe practices, stating laboratory safety rules, and evaluating correct versus incorrect laboratory rules.

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Part 1: Analyzing the Figure

#### a) Unsafe Practices Shown by the Students
The figure illustrates several unsafe behaviors. Here are three examples:

1. Student Jumping on the Table:
- One student is jumping on the table, which is highly unsafe. This can lead to accidents, such as falling off the table or knocking over equipment, chemicals, or glassware.

2. Improper Handling of Chemicals:
- A student appears to be holding a container with a chemical while another student is eating or drinking. This is dangerous because chemicals can be toxic if ingested or inhaled.

3. Distraction and Lack of Focus:
- The students seem to be engaged in activities unrelated to the experiment, such as playing or interacting inappropriately. This lack of focus increases the risk of accidents, such as spills or misuse of equipment.

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#### b) Laboratory Safety Rules
Here are two general rules that should always be followed in a science laboratory:

1. Always Wear Personal Protective Equipment (PPE):
- This includes lab coats, gloves, safety goggles, and closed-toe shoes. PPE protects against chemical splashes, burns, and other hazards.

2. No Eating, Drinking, or Smoking in the Laboratory:
- Consuming food or drinks in the lab can lead to contamination of samples or accidental ingestion of hazardous substances.

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Part 2: Correct vs. Incorrect Laboratory Rules

#### Instructions:
Mark a (Y) for correct rules and an (N) for incorrect rules.

#### Evaluation:
1. Do not eat or drink in a laboratory
- (Y)
- Explanation: Eating or drinking in a laboratory is strictly prohibited because it can lead to contamination of samples or accidental ingestion of hazardous substances.

2. Do not wear a laboratory coat to protect the body
- (N)
- Explanation: Wearing a laboratory coat is essential to protect the body from spills, splashes, and other hazards. The rule should state "Wear a laboratory coat to protect the body."

3. Wear safety goggles if there is a risk to the eyes
- (Y)
- Explanation: Safety goggles are necessary to protect the eyes from chemical splashes, dust, or other potential hazards.

4. Know what to do if there is a fire
- (Y)
- Explanation: Understanding emergency procedures, such as how to respond to a fire, is crucial for laboratory safety.

5. Always do what the teacher tells you to do
- (Y)
- Explanation: Following the instructions of the teacher ensures that experiments are conducted safely and correctly.

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Final Answers

#### Part 1:
a) Unsafe Practices:
1. Student jumping on the table.
2. Improper handling of chemicals.
3. Distraction and lack of focus.

b) Laboratory Safety Rules:
1. Always wear personal protective equipment (PPE).
2. No eating, drinking, or smoking in the laboratory.

#### Part 2:
1. Do not eat or drink in a laboratory: (Y)
2. Do not wear a laboratory coat to protect the body: (N)
3. Wear safety goggles if there is a risk to the eyes: (Y)
4. Know what to do if there is a fire: (Y)
5. Always do what the teacher tells you to do: (Y)

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Boxed Final Answer

\[
\boxed{
\text{Part 1:}
\begin{aligned}
&\text{a) 1. Student jumping on the table.} \\
&\text{ 2. Improper handling of chemicals.} \\
&\text{ 3. Distraction and lack of focus.} \\
&\text{b) 1. Always wear personal protective equipment (PPE).} \\
&\text{ 2. No eating, drinking, or smoking in the laboratory.}
\end{aligned}
\text{Part 2:}
\begin{aligned}
&\text{1. (Y)} \\
&\text{2. (N)} \\
&\text{3. (Y)} \\
&\text{4. (Y)} \\
&\text{5. (Y)}
\end{aligned}
}
\]