Dare To Dash Level 2
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Questions and Answers
- 1.
Flammable materials, like alcohol, should never be dispensed or used near
- A.
An open door
- B.
An open flame
- C.
Another student
- D.
A sink
Correct Answer
B. An open flameExplanation
Flammable materials, like alcohol, should never be dispensed or used near an open flame because they can easily catch fire and cause a dangerous situation. Open flames produce heat and can ignite flammable substances, leading to a potential fire hazard. It is important to keep flammable materials away from open flames to prevent accidents and ensure safety.Rate this question:
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- 2.
If a fire erupts in the class during a lab, immediately
- A.
Notify your instructor
- B.
Run for the fire extinguisher
- C.
Throw water on the fire
- D.
Open the windows
Correct Answer
A. Notify your instructorExplanation
In the event of a fire during a lab, it is important to immediately notify your instructor. They are responsible for ensuring the safety of everyone in the class and will be able to take appropriate action to control the fire and evacuate the area if necessary. Running for the fire extinguisher or throwing water on the fire without proper training can be dangerous and may worsen the situation. Opening the windows can help with ventilation but should not be the first priority. Therefore, notifying the instructor is the most appropriate and safest course of action.Rate this question:
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- 3.
Approved eye protection devices such as goggles are worn in the laboratory
- A.
To avoid eye strain
- B.
To improve your vision
- C.
Only if you don't have corrective glasses
- D.
Any time chemicals, heat or glassware are used
Correct Answer
D. Any time chemicals, heat or glassware are usedExplanation
Approved eye protection devices such as goggles are worn in the laboratory to ensure the safety of the eyes. This is especially important when working with chemicals, heat, or glassware, as these can pose a risk to the eyes. Wearing goggles can help prevent any potential eye injuries or damage that may occur in such situations.Rate this question:
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- 4.
After completing an experiment, all chemical wastes should be
- A.
Left at your lab station for the next class
- B.
Disposed of according to your instructor's direction
- C.
Dumped in the sink
- D.
Taken home
Correct Answer
B. Disposed of according to your instructor's directionExplanation
After completing an experiment, all chemical wastes should be disposed of according to your instructor's direction. This is because chemical wastes can be hazardous and need to be handled and disposed of properly to ensure the safety of everyone in the lab. Following the instructor's direction ensures that the waste is handled in a way that minimizes the risk of accidents or environmental damage.Rate this question:
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- 5.
You are heating a substance in a test tube. Always point the open end of the tube
- A.
Toward yourself
- B.
Toward your lab partner
- C.
Toward another classmate
- D.
Away from all people
Correct Answer
D. Away from all peopleExplanation
When heating a substance in a test tube, it is important to point the open end of the tube away from all people. This is because heating the substance can cause it to bubble or splatter, potentially releasing harmful gases or hot liquid. Pointing the open end away from all people ensures that any potential hazards are directed away from individuals, reducing the risk of injury or exposure to dangerous substances.Rate this question:
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- 6.
You are heating a piece of glass and now want to pick it up. You should
- A.
Use a rag or paper towels
- B.
Pick up the end that looks cooler
- C.
Use tongs
- D.
Pour cold water on it
Correct Answer
C. Use tongsExplanation
When heating a piece of glass, it becomes extremely hot and can cause burns if touched directly. Using tongs is the safest option as it allows you to pick up the glass without risking injury. Using a rag or paper towels may not provide enough protection, picking up the end that looks cooler can be deceiving and still cause burns, and pouring cold water on the hot glass can cause it to shatter due to thermal shock.Rate this question:
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- 7.
You have been injured in the laboratory (cut, burn, etc.). First you should
- A.
Visit the school nurse after class
- B.
See a doctor after school
- C.
Tell the science instructor at once
- D.
Apply first aid to yourself
Correct Answer
C. Tell the science instructor at onceExplanation
In case of an injury in the laboratory, it is important to inform the science instructor immediately. The science instructor is responsible for the safety and well-being of the students in the laboratory. They can provide immediate assistance, assess the severity of the injury, and take appropriate action. The instructor may also have knowledge of first aid procedures and can guide the student on how to handle the situation until further medical help is available.Rate this question:
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- 8.
Personal eyeglasses provides as much protection as
- A.
A face shield
- B.
Safety glasses
- C.
Splashproof chemical googles
- D.
None of the above
Correct Answer
D. None of the aboveExplanation
Personal eyeglasses do not provide as much protection as a face shield, safety glasses, or splashproof chemical goggles. While personal eyeglasses may provide some level of protection for the eyes, they are not designed or tested to withstand the same level of impact or protect against chemical splashes as the other options listed. Therefore, the correct answer is none of the above.Rate this question:
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- 9.
Long hair in the laboratory must be
- A.
Cut short
- B.
Held away from the experiment with one hand
- C.
Always neatly groomed
- D.
Tied back or kept entirely out of the way by tying it with a hair band.
Correct Answer
D. Tied back or kept entirely out of the way by tying it with a hair band.Explanation
Long hair in the laboratory must be tied back or kept entirely out of the way by tying it with a hair band because it can pose a safety hazard. Loose hair can easily come into contact with chemicals, open flames, or equipment, increasing the risk of accidents or contamination. Tying the hair back ensures that it is secured and away from the experiment, reducing the chances of it interfering with the work or causing any harm.Rate this question:
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- 10.
If a piece of equipment is not working properly, stop, turn it off, and tell
- A.
The custodian
- B.
Your lab partner
- C.
Your best friend in the class
- D.
The science teacher
Correct Answer
D. The science teacherExplanation
When a piece of equipment is not working properly, it is important to follow safety protocols. Stopping and turning off the equipment is necessary to prevent any further damage or potential harm. However, simply stopping and turning off the equipment is not enough. It is crucial to inform someone who is responsible and knowledgeable about the equipment, such as the science teacher. They will have the expertise to assess the situation, troubleshoot the problem, and ensure that proper repairs or maintenance are carried out.Rate this question:
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- 11.
When you finish working with chemicals, biological specimens, and other lab substances, always
- A.
Treat your hands with skin lotion
- B.
Wash your hands thoroughly with soap and water
- C.
Wipe your hands on a towel
- D.
Wipe your hands on your clothes
Correct Answer
B. Wash your hands thoroughly with soap and waterExplanation
Washing your hands thoroughly with soap and water is the correct answer because it is the most effective way to remove any chemicals, biological specimens, or other lab substances from your hands. Skin lotion may provide some moisturization, but it does not effectively remove contaminants. Wiping your hands on a towel or clothes may also not completely remove the substances and may even spread them to other surfaces.Rate this question:
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- 12.
Hot glass looks the same as cold glass
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Hot glass and cold glass can often appear very similar in terms of their visual appearance. This is because the physical properties of glass do not change significantly when it is heated or cooled. Both hot and cold glass can be transparent and have a similar smooth and shiny surface. Therefore, it is difficult to distinguish between hot and cold glass based solely on their visual characteristics.Rate this question:
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- 13.
Never remove chemicals or other equipment from the classroom
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
It is important to never remove chemicals or other equipment from the classroom because they are there for a specific purpose and removing them can disrupt the learning environment and pose potential safety hazards. Chemicals and equipment are typically provided by the school or institution for specific experiments or activities, and removing them can lead to a lack of resources for other students or disrupt the planned curriculum. Additionally, removing chemicals without proper knowledge or authorization can be dangerous and result in accidents or injuries.Rate this question:
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- 14.
Crucible is made up from ceramic. Do you know why?
- A.
It has high melting point
- B.
It is good electrical conductor
- C.
It is ductile
- D.
It has various shape
Correct Answer
A. It has high melting pointExplanation
Ceramic is used to make a crucible because it has a high melting point. A crucible is a container that is used to heat substances to very high temperatures. Since ceramic materials can withstand high temperatures without melting or deforming, they are ideal for this purpose. Other materials like metals or plastics would not be suitable as they would melt or deform under the extreme heat. Therefore, the high melting point of ceramic makes it the correct choice for making a crucible.Rate this question:
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- 15.
Can you help me? I wonder how to carry out combustion reaction safely.
- A.
Switch off the fan
- B.
Wear lab coat
- C.
Use white tile
- D.
Avoid flame
Correct Answer(s)
A. Switch off the fan
B. Wear lab coat
C. Use white tile
D. Avoid flameExplanation
To carry out a combustion reaction safely, it is important to switch off the fan to prevent the spread of flames or fumes. Wearing a lab coat provides protection from any potential splashes or spills. Using a white tile as a surface for the reaction allows for better visibility of any changes or reactions. Finally, avoiding open flames helps minimize the risk of fire or explosions.Rate this question:
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- 16.
In a laboratory, the following should not be worn
- A.
Specticle
- B.
Dangling jewelry
- C.
Sandals
Correct Answer(s)
B. Dangling jewelry
C. SandalsExplanation
In a laboratory, it is important to avoid wearing dangling jewelry and sandals. Dangling jewelry can pose a risk of getting caught in equipment or chemicals, potentially causing accidents or injuries. Sandals, on the other hand, do not provide adequate protection for the feet and can be easily damaged by spills or falling objects. Therefore, it is recommended to wear appropriate footwear and avoid wearing any loose or dangling accessories in order to maintain a safe and secure laboratory environment.Rate this question:
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- 17.
The following footwear is best in the laboratory
- A.
Sandals
- B.
Open-toes shoes
- C.
Closed-toed shoes
- D.
Shoes appropriate for the weather
Correct Answer
C. Closed-toed shoesExplanation
Closed-toed shoes are the best footwear in the laboratory because they provide maximum protection to the feet. In a laboratory setting, there are potential hazards such as chemicals, sharp objects, and heavy equipment that can cause injuries. Closed-toed shoes cover the entire foot, reducing the risk of accidental spills or objects falling on the feet. They also prevent the entry of harmful substances or liquids that could cause burns or other injuries. Additionally, closed-toed shoes offer better support and stability, reducing the likelihood of slips, trips, or falls in a potentially hazardous environment.Rate this question:
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