Post Lab Questions: Sc. Inquiry & Lab Safety

A disinfectant is used on your work surface:

before the beginning of lab procedures, after all work is complete, and after any spill of live organisms.

Experiment

carry out the strategy, collect measurements

When utilizing the scientific method, there are two types of variables. They are

dependent and independent

In which circumstance is food and/or beverage allowed in the laboratory?

never

Lab coats, gloves, face masks, and goggles are all examples of

personal protective equipment

Which of the following are reasons for washing hands before and after lab activities? (Select all that apply)

-Hands may be a source of contamination to the lab experiments. -Hands may become contaminated with infectious bacteria during lab experiments. -Hands may become strained during lab. -Hands may be contaminated with irritating chemicals during experiments.

If the hypothesis in a scientific experiment is not supported, the experiment is considered a complete failure and must be repeated until a satisfactory outcome is reached.

False

Which of the following represent important safety procedures for microbiology students? (Select all that apply)

-Wash your hands before and after laboratory procedures. -Disinfect your lab bench at the beginning and end of the lab period. -Take extra care around the flame of a Bunsen burner by tying up hair and keeping it from combustibles.

Which of the following items may be on the laboratory bench top while doing lab work? (Select all that apply)

-cultures (broth tubes, agar plates, agar slants) -equipment items specifically needed to complete the lab activity. -pencil or pen

What should be done to prepare or deal with a laboratory emergency? (Select all that apply)

-know the location of safety equipment such as the fire extinguisher -notify your instructor regarding spills or nonemergency situations -call 911 if an emergency occurs

Which of the following should be worn at ALL times in the lab? (Select all that apply)

-lab coat -closed-toed shoes

Which of the following items should be disposed of in the Sharps container? (Select all that apply)

-needles -glass pipettes -broken glass -scalpel blades

Who and/or what is protected by lab safety protocols? (Select all that apply)

-students doing lab activities -lab instructors and technical assistants -anyone who walks into the lab -the physical lab space and the equipment housed within the lab

When determining the scope of an experiment, you need to consider (Select all that apply)

-the outcome you will investigate. -the factor will vary.

This image illustrates what correct safety practices? (Select all that apply)

-use of gloves and eye protection -tying back of long hair -uncluttered work bench -wearing of the lab coat

Hypothesis

formulate a hypothesis and create a strategy

Imagine that you wish to compare two different diets that will be fed to tadpoles raised in a lab. One diet is a meat-based fish food, and the other is the traditional diet of boiled lettuce. You want to see if the meat-based diet will be associated with an increase in the average weight of the tadpoles. In your experiment you keep all other factors, such as tadpole density per pan, temperature, pH, and the amount of food the same. The only difference between your control and experimental groups is the type of food the tadpoles receive. What is the independent variable for the tadpole diet experiment?

diet

Report

document results

Analysis

draw graphs, evaluate the hypothesis

Using a cell phone in lab is permissible since it can be used for timing experiments

false