Lab Equipment
What piece of lab equipment would you use to HEAT something in the lab?
Bunsen burner
What is the safe way to hold a test tube when heating something?
Use a test tube holder and point tube away from people
If people exercise for more than 10 minutes every day, then they are more likely to have a lower resting heart rate. This is an example of what step of the scientific method?
Hypothesis
What is a pipette used for?
transferring liquids
Name the large piece of equipment that lab materials can attach to (such as ring clamp, test tube clamp).
Ring stand
How do you use the fire extinguisher?
Pull the pin, point the hose, squeeze the trigger at the flame
At the end of an experiment you write a statement to either accept or reject your hypothesis. What step of the scientific method is this?
Conclusion
100 men were divided into 2 groups of 50 to test a new cream 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.
What something that we use to measure liquids in lab.
graduated cylinder
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
List the steps of the scientific method from beginning to end.
Purpose, Research, Hypothesis, Experiment, Analysis, Conclusion
When you need to find the mass of a solid, you use this on top of the scale
Weigh boat
Your lab partner reaches across the bunsen burner to get his pencil. His shirt sleeve catches on fire. What should he do?
Smother out with fire blanket, stop drop and roll, or use safety shower
What is the standard of comparison in an experiment called?
The Control group
Harold wants to know if eating breakfast helps you do better on tests. He gets 10 friends 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/Not eating breakfast
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.
When you need to add small amounts of measured liquid, you use this long, marked piece of lab equipment.
Graduated pipette
When the lab requires goggles, when and how do you wear them?
Wear them at all times covering your eyes until the lab is finished.
What are the parts of the experiment that are kept the same throughout all the trials called?
Constants
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.
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