Lab Safety - worksheet - Name: Lab Safety Worksheet Look at the ... - Free Printable

Lab Safety Worksheet Solutions

#### Panel 1:
1. List 2 unsafe activities in this picture and explain how they should be changed to make them safe.
- a. Kimberly is using a hairdryer near flammable materials (e.g., the fire blanket). This is unsafe because it could cause a fire or electrical hazard. She should avoid using electrical appliances near flammable materials and ensure that all equipment is properly grounded.
- b. Jodi is holding her hair while working with chemicals. This is unsafe because chemicals can splash and cause burns or irritation. She should tie back her hair and wear appropriate protective gear, such as a lab coat and goggles.

#### Panel 2:
2. How should Rick correct his technique?
- Rick is pouring liquid from one container to another without proper support or stabilization. He should use a ring stand or clamp to hold the containers steady to prevent spills and accidents.

3. Are these students behaving appropriately? If not, what should they be doing differently?
- No, the students are not behaving appropriately.
- Sarah: She is wearing a mask but appears to be distracted or not focused on her task. She should remain attentive and follow proper safety protocols.
- Andrew: He is drinking from a straw while working with chemicals. This is extremely unsafe as it increases the risk of ingesting harmful substances. He should avoid eating, drinking, or smoking in the lab.

#### Panel 3:
4. Compare Evelyn’s technique with Kwan’s technique.
- Evelyn: She is using a pipette correctly by holding it upright and carefully dispensing the liquid into the test tube. This is the proper technique.
- Kwan: He is tilting the pipette and appears to be struggling to control the flow of liquid. This increases the risk of spills and inaccurate measurements.

5. Whose technique is the correct one? Why?
- Evelyn’s technique is correct. She is holding the pipette upright and controlling the flow of liquid precisely, which minimizes the risk of spills and ensures accurate measurements.

#### Panel 4:
6. List two things that should NOT be in the lab.
- a. The football. Sports equipment has no place in a laboratory and can create distractions or hazards.
- b. Food and drinks. Eating or drinking in the lab is unsafe because it increases the risk of contamination and accidental ingestion of hazardous substances.

7. What unsafe activity is shown in this picture?
- The students are playing with a football in the lab, which is highly inappropriate. They should focus on their experiments and avoid bringing personal items into the lab.

8. What will happen to the students who are doing the unsafe activity?
- The students could face disciplinary action, such as being removed from the lab or receiving a failing grade for the experiment. More importantly, their unsafe behavior could lead to accidents, injuries, or contamination of the lab environment.

#### Panel 5:
9. Describe Jarvis’ error.
- Jarvis is sweeping up broken glassware without wearing gloves or using a dustpan. This is unsafe because he risks cutting himself on the sharp glass fragments.

10. Who in this scenario is performing a correct procedure? What is the correct procedure?
- Penny is performing the correct procedure. She is using a dustpan and brush to safely collect the broken glassware, minimizing the risk of injury.

11. What is Penny doing wrong?
- Penny is taking a photo while cleaning up the broken glassware. While she is using the correct tools, she should focus entirely on the cleanup process to avoid distractions that could lead to accidents.

#### Panel 6:
12. What is wrong with Ernie’s behavior?
- Ernie is celebrating or showing off after breaking glassware. This is unsafe and irresponsible because it indicates a lack of concern for safety and proper lab procedures. He should immediately report the incident and assist in cleanup.

13. Why is Lydia’s behavior appropriate? Why is it important in a laboratory setting?
- Lydia is wearing gloves and handling the broken glassware carefully. This is appropriate because it protects her from cuts and exposure to contaminants. In a laboratory setting, it is crucial to prioritize safety to prevent injuries and maintain a clean, controlled environment.

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Final Answer:

\boxed{
\text{See detailed explanations above for each question.}
}