Lab Safety/Equipment
The Scientific Method
Variables
Measurement, Mass, Volume, Density
FINAL JEOPARDY
100
Why is it important to maintain a clean and organized workspace in a lab?
To be safe and ensure experiments run smoothly.
100
What is the first step of the scientific method.
Make an observation.
100
The variable in an experiment that is unchanged and constant.
The control variable
100
Which object is MORE dense?
A
100
What is the density of water? (the unit is g/mL)
1.0 g/mL
200
Name two pieces of personal protection equipment worn in the lab (PPE).
Googles
Gloves
Lab coat/apron
200
What are the FIVE senses?
Touch
Taste
Smell
Hearing
Sight
200
The variable that is changed or manipulated by the experimenter is called the? (Hint: "I" change this”.)
Independent Variable
200
What is the measurement system scientists use?
The Metric System.
300
Which type of lab equipment is used for transferring very small volumes of liquid?
Pipette
300
Make an observation.
Answers will vary
300
The variable that represents what you are testing? It is the data that you collect from your experiment.
Dependent Variable
300
What is the curved surface formed by the liquid in a graduated cylinder called?
Meniscus
400
Which lab equipment is used to accurately weigh substances in a laboratory? (FULL NAME)
Triple Beam Balance
400
The name of the information that you get from your experiment. (You plot and graph this)
Data
400
The independent variable is plotted on the __ axis, and the dependent variable is plotted on the __ axis.
x, y
400
Rank the objects from MOST dense to LEAST dense
Screw
Grape
Bottle Cap
Sponge
500
What should you immediately do after a spill in the lab?
Tell the teacher
500
Make an inference.
(A logical conclusion based on evidence and observations)
Answers will vary
500
What is the independent variable:
If students study more, then they will get better test grades.
A. Time spent studying
B. Test Grades
A. Time Spent Studying.
"I" can change this.
500
The initial water level in a graduated cylinder is 20 mL. A student places a cube in the graduated cylinder and the water level rises to 33 mL. What is the volume of the cube?
13 mL