Laboratory Tools and Safety

Question 1

Describe how the meniscus is used to read volume measurements on a graduated cylinder.

Revolt · Accepted Answer

Read the volume at eye level at the bottom of the meniscus. The meniscus is the curved surface of the liquid, and reading its lowest point gives the most accurate measurement.

Question 2

Explain why the several different types of microscopes are all necessary.

Revolt · Accepted Answer

Several types of microscopes are necessary because no single microscope can show every kind of specimen in the same way. Light microscopes can view living cells, while electron microscopes provide much greater magnification and resolution; scanning electron microscopes show surfaces, and transmission electron microscopes show internal structures.

Question 3

What are the two pieces of safety equipment used to respond to fires in the lab?

Revolt · Accepted Answer

The two pieces of equipment are a fire blanket and a fire extinguisher.

Question 4

An experiment looking at structures smaller than a cell would most likely employ a _______.a.dissecting microscopeb.transmission electron microscopec.scanning electron microscoped.compound light microscope

Revolt · Accepted Answer

B

Question 5

A balance is best used to measure a sample’s _______.a.volumeb.lengthc.massd.size

Revolt · Accepted Answer

C

Question 6

What feature is common to all microscopes, and how is this feature related in the word "microscope"?

Revolt · Accepted Answer

All microscopes have a magnifying and focusing system, usually lenses, that allows objects to be viewed in greater detail. “Microscope” means an instrument for viewing (“scope”) very small (“micro”) objects.

Question 7

Which of the following pieces of laboratory equipment is not directly used to make measurements?a.test tubeb.graduated cylinderc.rulerd.thermometer

Revolt · Accepted Answer

A

Question 8

Which of the following pieces of lab equipment is used to protect eyes?a.lab coatb.fire blanketc.fire extinguisherd.goggles

Revolt · Accepted Answer

D

Question 9

Which of the following is the best explanation for why it is important to follow lab safety guidelines?a.Following laboratory safety guidelines prevents all lab accidents.b.Following laboratory safety guidelines minimizes the chance of lab accidents.c.Following laboratory safety guidelines prevents fires.d.Following laboratory safety guidelines allows quick response during lab accidents.

Revolt · Accepted Answer

B

Question 10

Why is it important for a researcher to know all safety procedures and where all safety equipment is stored even if they never have an accident?

Revolt · Accepted Answer

Knowing the safety procedures and the locations of safety equipment helps a researcher prevent problems and respond quickly if an emergency occurs. Quick action can reduce injuries, damage, and exposure to hazards.

Laboratory Tools and Safety Answers

More from this Course

TRY EDGENUITY HACKS