Laboratory Safety Worksheet | Free Laboratory Safety Worksheet ... - Free Printable
Educational worksheet: Laboratory Safety Worksheet | Free Laboratory Safety Worksheet .... Download and print for classroom or home learning activities.
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Show Answer Key & Explanations
Step-by-step solution for: Laboratory Safety Worksheet | Free Laboratory Safety Worksheet ...
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Show Answer Key & Explanations
Step-by-step solution for: Laboratory Safety Worksheet | Free Laboratory Safety Worksheet ...
Let's go through each question on the Laboratory Safety Worksheet and provide clear, accurate answers with explanations. The worksheet includes questions about proper lab safety procedures, tools, and symbols.
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Answer:
Corrosive, hygroscopic, or powdery substances (like chemicals that absorb moisture or react with air) should not be placed directly on the balance pan.
Explanation:
These materials can damage the balance, contaminate it, or cause inaccurate readings. Always use containers like weighing boats, paper, or glassware to protect the balance.
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Answer:
A funnel and a glass stirring rod.
Explanation:
- A funnel helps direct the flow of liquid into a narrow opening (like a test tube or flask), minimizing spills.
- A glass stirring rod can be used to guide the liquid stream and prevent splashing when transferring liquids between containers.
*(Illustration shows a funnel and a triangle — likely representing a funnel and a beaker or flask.)*
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Answer:
Hold the stopper in your hand, not on the benchtop, when removing it from a flask.
Explanation:
This prevents contamination of the chemical or the stopper. If the stopper is placed on a surface, it may pick up dust or contaminants. Always keep it clean and handle it carefully.
*(Illustration shows a flask with a stopper nearby — indicating proper handling.)*
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Answer:
Do not treat acid or base pills as medication. They are not safe to ingest and must be handled with care.
Explanation:
"Acid or base pill" likely refers to chemical tablets (e.g., pH indicators or reagents). These are not edible and should only be used for laboratory purposes. Never consume any chemical substance.
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Answer:
No, chewing gum is not allowed in the laboratory.
Explanation:
Chewing gum increases the risk of accidental ingestion of chemicals or contamination. It also distracts from safety procedures. Lab rules typically prohibit food, drink, and chewing gum to prevent accidents and contamination.
*(Illustration shows a red question mark — emphasizing caution or "no.")*
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Answer:
Immediately rinse your hands under running water and notify your teacher or supervisor.
Explanation:
Skin exposure to chemicals can cause burns or irritation. Wash the affected area thoroughly with water. Then clean the lab table using appropriate spill kits or neutralizing agents. Always report spills to an instructor.
*(Illustration shows a spill — indicating emergency response.)*
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Answer:
Never pour unused chemicals down the drain or back into original containers. Return them to the designated waste container or follow instructions from your teacher.
Explanation:
Mixing chemicals improperly can cause dangerous reactions. Unused chemicals should be disposed of according to safety protocols (e.g., hazardous waste disposal). This protects the environment and ensures safety.
*(Illustration shows two flasks — suggesting proper disposal or storage.)*
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Answer:
Toxicity or poison.
Explanation:
The skull and crossbones symbol indicates that the substance is toxic or poisonous. It warns users that the chemical can be harmful or fatal if ingested, inhaled, or absorbed through the skin.
*(Illustration shows a skull and crossbones — the universal symbol for poison.)*
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| Question | Answer |
|--------|--------|
| 1 | Corrosive, hygroscopic, or powdery substances (use containers instead) |
| 2 | Funnel and glass stirring rod |
| 3 | Hold the stopper in your hand, not on the bench |
| 4 | Do not ingest; treat as hazardous chemicals only |
| 5 | No, chewing gum is prohibited in the lab |
| 6 | Rinse hands immediately and inform teacher |
| 7 | Dispose of in designated waste containers |
| 8 | Toxicity / Poison |
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✔ Always follow lab safety rules to prevent accidents and ensure a safe working environment!
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1. What materials should not be placed directly on the balance pan?
Answer:
Corrosive, hygroscopic, or powdery substances (like chemicals that absorb moisture or react with air) should not be placed directly on the balance pan.
Explanation:
These materials can damage the balance, contaminate it, or cause inaccurate readings. Always use containers like weighing boats, paper, or glassware to protect the balance.
---
2. What are the two tools that can assist in pouring liquid chemicals from one container to another?
Answer:
A funnel and a glass stirring rod.
Explanation:
- A funnel helps direct the flow of liquid into a narrow opening (like a test tube or flask), minimizing spills.
- A glass stirring rod can be used to guide the liquid stream and prevent splashing when transferring liquids between containers.
*(Illustration shows a funnel and a triangle — likely representing a funnel and a beaker or flask.)*
---
3. How should you hold the stopper when removing chemicals from a flask, for example?
Answer:
Hold the stopper in your hand, not on the benchtop, when removing it from a flask.
Explanation:
This prevents contamination of the chemical or the stopper. If the stopper is placed on a surface, it may pick up dust or contaminants. Always keep it clean and handle it carefully.
*(Illustration shows a flask with a stopper nearby — indicating proper handling.)*
---
4. How should an acid or base pill be treated?
Answer:
Do not treat acid or base pills as medication. They are not safe to ingest and must be handled with care.
Explanation:
"Acid or base pill" likely refers to chemical tablets (e.g., pH indicators or reagents). These are not edible and should only be used for laboratory purposes. Never consume any chemical substance.
---
5. Can you chew gum during a lab?
Answer:
No, chewing gum is not allowed in the laboratory.
Explanation:
Chewing gum increases the risk of accidental ingestion of chemicals or contamination. It also distracts from safety procedures. Lab rules typically prohibit food, drink, and chewing gum to prevent accidents and contamination.
*(Illustration shows a red question mark — emphasizing caution or "no.")*
---
6. What is the first thing to do if you spill a chemical on both the lab table and your hands?
Answer:
Immediately rinse your hands under running water and notify your teacher or supervisor.
Explanation:
Skin exposure to chemicals can cause burns or irritation. Wash the affected area thoroughly with water. Then clean the lab table using appropriate spill kits or neutralizing agents. Always report spills to an instructor.
*(Illustration shows a spill — indicating emergency response.)*
---
7. What should you do with unused chemicals at the end of the lab?
Answer:
Never pour unused chemicals down the drain or back into original containers. Return them to the designated waste container or follow instructions from your teacher.
Explanation:
Mixing chemicals improperly can cause dangerous reactions. Unused chemicals should be disposed of according to safety protocols (e.g., hazardous waste disposal). This protects the environment and ensures safety.
*(Illustration shows two flasks — suggesting proper disposal or storage.)*
---
8. I am the head and cross-bone seen on chemical bottles or boxes. I can be found on chemical bottles or boxes. I am a symbol for ___?
Answer:
Toxicity or poison.
Explanation:
The skull and crossbones symbol indicates that the substance is toxic or poisonous. It warns users that the chemical can be harmful or fatal if ingested, inhaled, or absorbed through the skin.
*(Illustration shows a skull and crossbones — the universal symbol for poison.)*
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✔ Final Answers Summary:
| Question | Answer |
|--------|--------|
| 1 | Corrosive, hygroscopic, or powdery substances (use containers instead) |
| 2 | Funnel and glass stirring rod |
| 3 | Hold the stopper in your hand, not on the bench |
| 4 | Do not ingest; treat as hazardous chemicals only |
| 5 | No, chewing gum is prohibited in the lab |
| 6 | Rinse hands immediately and inform teacher |
| 7 | Dispose of in designated waste containers |
| 8 | Toxicity / Poison |
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✔ Always follow lab safety rules to prevent accidents and ensure a safe working environment!
Parent Tip: Review the logic above to help your child master the concept of lab safety worksheet answers.
