Knife Skills

What is the primary purpose of using a knife in scientific experiments?

• To cut materials precisely

• To measure liquid volumes

• To heat substances

• To mix chemicals

Which of the following is a safety precaution when using knives in a laboratory?

• Wearing gloves

• Using a dull knife

• Cutting towards your body

• Holding the knife by the blade

In a biology lab, a knife is often used to dissect specimens. What is the main scientific benefit of dissection?

• To observe internal structures

• To preserve the specimen

• To change the specimen's color

• To increase the specimen's size

What type of knife is commonly used in a laboratory for precise cutting?

• Scalpel

• Butter knife

• Chef's knife

• Pocket knife

When sharpening a laboratory knife, what angle should be maintained between the blade and the sharpening stone for optimal sharpness?

• 20 degrees

• 45 degrees

• 90 degrees

• 5 degrees

Which material is most suitable for a laboratory knife handle to ensure a firm grip?

• Rubber

• Glass

• Metal

• Plastic

In a chemistry lab, why is it important to use a clean knife when cutting samples?

• To avoid contamination

• To increase weight

• To change color

• To improve texture

What is the scientific term for the process of using a knife to separate a mixture into its components?

• Mechanical separation

• Chemical reaction

• Evaporation

• Filtration

Which of the following is a common use of knives in environmental science?

• Sampling plant tissues

• Measuring air quality

• Recording temperature

• Analyzing water samples

In physics, what principle explains the force required to cut through a material with a knife?

• Pressure = Force/Area

• Newton's Third Law

• Conservation of Energy

• Hooke's Law