Lab 1
Choose ALL of the following that should not be worn in the lab:
1. sandals
2. shorts
When glass is broken in the lab, where should it be placed?
Use a dust pan and broom and put it in the garbage.
Why don’t scientists stop with the first step in the Scientific Method, making observations?
They want to test what they observe to make sure it is correct.
What was Fleming's hypothesis as he was testing the mold with the bacteria?
A chemical in the mold kills bacteria.
What do the lines in a structural formula represent?
bonds
Choose all of the following that are mandatory for general lab work:
1. lab coat
2. safety glasses
3. gloves
When lighting a burner in lab, you should always make sure (choose all that apply):
1. to have your hair tied back out of the way of the fire.
2. to avoid reaching over other objects to light the burner.
3. have your safety glasses on.
4. to move all flammable objects off the lab table.
What is a hypothesis?
a prediction
How did Fleming test his hypothesis?
He isolated and grew mold, then applied it to the bacteria to see the results.
A double bond is represented by ________________.
two lines between atoms
From your lab, you learned that it was important to keep the lab clean and free from debris. Which of the following should you always do?
Answer: All of the above.
What do we know about gum and jewelry in the lab?
Spit out gum and leave jewelry elsewhere.
Once they form a hypothesis, what do scientists do next?
design experiments to test their hypothesis
Which statement best summarizes the results of Fleming's experiment?
The mold Fleming grew killed the bacteria he tested it on.
In your molecular models, what do the beads or play-doh balls represent?
atoms
Where in the lab would you find the escape route for your building?
Answer: on the wall or door visible in the lab
Use this in the event that a chemical spill comes in contact with your skin:
safety shower
What does it mean to control variables in an experiment?
to keep as many things the same as possible across the parts of an experiment
Fleming's mold experiment led to the development of what major medical advancement?
using mold to produce antibiotics
How many covalent bonds can carbon form?
4
When you are mixing chemicals in the lab, which of the following is true?
Always add acid to the mixture.
Why do scientists write down every detail of an experiment?
so they can repeat the experiment to compare results
When did Fleming begin his study on mold?
1928
How many covalent bonds can Nitrogen form?
3