Chapter Test 1: Lab Safety, Scientific Method, and the Microscop

What are the three most important lab safety rules to follow?

• Wear personal protective equipment only when convenient, mishandle chemicals, and don't bother to locate safety equipment and emergency exits

• Wear appropriate personal protective equipment, follow proper chemical handling procedures, and know the location of safety equipment and emergency exits.

• Wear inappropriate personal protective equipment, ignore chemical handling procedures, and don't know the location of safety equipment and emergency exits

• Never wear personal protective equipment, handle chemicals with bare hands, and block emergency exits

Why is it important to wear safety goggles in the laboratory?

• To keep the hair out of the eyes

• To protect the eyes from potential hazards

• To improve vision

• To make a fashion statement

What should you do if you spill a chemical on your skin?

• Apply vinegar to the affected area

• Rub the affected area with a dry towel

• Cover the affected area with a bandage

• Rinse the affected area with plenty of water for at least 15 minutes.

Why is it important to tie back long hair and loose clothing in the laboratory?

• To follow fashion trends

• To prevent accidents and injuries

• To keep hair and clothing clean

• To make the lab look more professional

What is the first step of the scientific method?

• Skip the observation step

• Make an observation or ask a question

• Guess the answer

• Mix chemicals together

What is the purpose of a control group in an experiment?

• To confuse the results

• To provide entertainment

• To provide a baseline for comparison

• To make the experiment more complicated

How can a microscope be properly handled and stored to ensure safety?

• Throw it around and store it in a damp and dirty place

• Handle roughly and store in a place with extreme temperatures

• Leave it out in the open and store it in a place with direct sunlight

• Handle with care and store in a clean, dry, and secure location

What is the function of the coarse adjustment knob on a microscope? (Hint: Remember, the course adjustment knob also brings the stage closer to provide quick focus.)

• Move the specimen on the microscope stage

• Change the magnification of the microscope

• Quickly focus the microscope on the specimen

• Adjust the lighting of the microscope

Why is it important to clean the microscope lenses before and after use?

• To save time and effort

• To ensure clear and accurate observations.

• To test the durability of the microscope

• To make the lenses look shiny

What is the proper procedure for focusing on a specimen using a microscope?

• Use the fine adjustment knob first, then the coarse adjustment knob

• Use the coarse adjustment knob to bring the specimen into rough focus, and then use the fine adjustment knob to bring it into sharp focus.

• Use the microscope without adjusting the focus

• Use the microscope with the lens cap on