LAB SAFETY
"What should you wear to protect your eyes during an experiment?",
Safety Goggles
"Is 'The liquid is red' quantitative or qualitative?
Qualitative
What is the first step of the scientific method?
Pose a Question
What is an inference?
An assumption
What is the dependent variable in an experiment?
•variables that may change as a result of the independent variable
If a chemical spills, what should you do first?"
Tell Ms. Peagler
Is 'The temperature is 75°C' quantitative or qualitative?
Quantitative
What do you call a possible answer to a question you can test?
Hypothesis
You see someone holding an umbrella. What can you infer?
Its raining
Give an example of an independent variable in a test about running speed.
The type of shoes, To see how it affects the runner’s speed.
"True or False: It's okay to eat and drink in the lab.
False
"What type of data uses numbers: quantitative or qualitative?
Quantitative
What is the step where you gather data and make observations?"
Data Collection, Observe Report
True or False: Inferences are based on evidence and reasoning
False
True or False: You change the independent variable on purpose.
True
"What safety tool do you use to wash chemicals from your eyes?"
Eye wash station
What type of data is based on the senses?
Qualitative
What should you do after analyzing your data?
Conclusion/ Report
You hear a fire alarm. What inference could you make?
Its a fire
In an experiment testing plant growth with different lights, what is the independent variable?
The lights
Name one item you should never wear during a lab experiment."
Dangling jewelry
"The plant's growth increased by 3.75 centimeters over 4 days, and its leaves changed from pale green to dark green."
Both — because:
Quantitative: "3.75 centimeters over 4 days" (measurable data)
Qualitative: "Leaves changed from pale green to dark green" (descriptive data)
"What is a variable in an experiment?"
•things that can be assigned or take on different values in an experiment
•any factor that can change
A student observes that a beaker is emitting steam and reads the thermometer as 100°C.
hich part of this statement is an objective observation, and which part is an inference? Explain.
"The thermometer reads 100°C" and "I see steam" — these are facts based on measurable tools and direct senses.
"The water must be boiling"
Give an example of a dependent variable in a taste test experiment.
We will discuss