Show:
Lab Equipment
Lab Safety
Steps of Scientifc Method
Controls & Variables
Random Choice
100
What piece of lab equipment would you use to HEAT something in the lab?
A bunsen burner or a hot plate
100
What is the safe way to hold a test tube when heating something?
Use a test tube holder
100
If people drink 4 alcoholic drinks, then they are more likely to crash when driving. This is an example of what step of the scientific method?
What is a Hypothesis
100
Which variable is the one the experimenter can manipulate in an experiment?
The Independent Variable
100

What is a pippette or a dropper used for

transferring liquids

200
Name a piece of equipment you can use during a dissection.
Dissecting tray Dissecting needle Forceps (tweezers) Scissors scalpel
200

How should you use a fire extinguisher?

Aim at the base of the fire. Never spray on people.

200
At the end of an experiment you write a statement to either accept or refute your hypothesis. What step of the scientific method is this?
What is the conclusion.
200

100 men were divided into 2 groups of 50 to test a new product...beard be gone. It is supposed to remove hair without having to shave. Group 1 was given beard be gone and Group 2 was given regular shaving cream. They were to use the product everyday for 1 week. What is the control in this experiment?

Group 2 - the group that used shaving cream.

200

Should you ever eat or drink anything when doing a lab? Explain (include exceptions).

No. Only if specifically instructed to do so by your teacher as part of the lab.

300
What something that we use to measure liquids in lab.
graduated cylinder beaker flask
300
Why is it important to label test tubes you are using with their contents (what's in them)?
So you don't mix them up or accidentally use the wrong one
300
In an experiment besides the Independent Variable, all the other factors must be the same for all the group you test. These other factors are known as what in the experiment?
The Constants or The Controlled Factors
300
3,000 people were divided into 3 groups to see how excercising affects pulse rate. Group 1 did no excercise for 10 minutes. Group 2 did a mild excercise (walking) for 10 minutes Group 3 did strenous excercise for 10 minutes. At the end of 10 minutes everyones pulse rate was recorded. What is the dependent variable in this experiment?
Average pulse rate of each person.
300
If you bake tater tots at a higher temperature then they will come out Crispier. This is an example of a...
Hypothesis
400
when you need to measure the weight of something what piece of equipment do you use?
A triple beam balance
400
Your lab partner reaches across the bunsen burner to get his pencil. His shirt sleeve catches on fire. What should he do?
Stand under safety shower Smother out with fire blanket or stop drop and roll
400
What is the standard of comparison in an experiment called?
The Control (group)
400
Harold wants to know eating breakfast helps you do better on a test. He gets 10 friends who take science with him to do an experiment. 5 friends eat breakfast before their science test and 5 do not. After the test Harold records all their grades. What is the independent variable in this experiment?
Eating breakfast
400
Extra (the gum) has a new longer lasting gum flavor. They tested it out on 10,000 people. Half were given the new longer lasting flavor gum and half were given the original. They were asked to let the experimenters know when their gum no longer had flavor. What is the Dependent Variable
Length of time gum flavor lasts.
500
When you use a microscope, what is the cover slip for?
To cover the specimen on the slide before you put it on the microscope.
500

When dissecting what do you do if you cut yourself?

Rinse under water, Apply pressure let teacher know so you can get medical attention.

500

What are the trials in an experiment?

The number of times you repeat the experiment.

500
Jody has itchy feet. Her friend Beth tells her soaking her feet in salt water will help. Her friend Mary tells her putting lotion on each night with socks will help. Jody decides to do an experiment and try both remedies. After 1 week her feet don't itch anymore. Jody decides both remedies worked. What is wrong with Jody's conclusion?
She tested both rememdies at the same time so there is no way to know if both really worked, or just one of them.
500
If you are making a graph which axis does the Independent Variable go on (X or Y) and which axis does the Dependent Variable go on (X or Y)?
Independent Variable - X Dependent Variable - Y