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Lab Safety
Scientific Method
Definitions
Vocab
Random
100
Give 2 examples of inappropriate lab attire (clothing)?
long sleeves, sandals, loose/flowy shirt, long loose hair, safety goggles
100
What is another term for an "educated guess" or a guess based upon observation.
a hypothesis
100
In an experiment, what do we call the variable that is being CHANGED or manipulated?
The INDEPENDENT variable.
100
Observation, inference, or prediction? The French fries will burn my tongue.
Prediction
100
True/false: The eye wash sink can be used to wash hands before a lab.
False, it is only to be used for eye injuries.
200
True or False: It is ok to take beverages into the lab area ONLY if they are in a closed container
False
200
What is the first step in the scientific method?
Ask/pose a question
200
What do we call a forecast of what will happen in the future based on past evidence?
A Prediction
200
What do we call the variable that is MEASURED/OBSERVED during an experiment?
The DEPENDENT (respondent) variable
200
Scenario: You are absent for one day. Explain 2 actions you can take to find out what you missed in class.
-Check pershingrocks.com website -call a study buddy
300
True or False: It is okay to touch, taste, and smell any chemicals
False
300
Which of the following is not part of the scientific method? A. Identify the problem B. Form a theory C. Analyze your results
What is B. Form a theory? We form a HYPOTHESIS.
300
What is a statement you make after using your senses or instruments?
An Observation
300
Observation, Inference, or Prediction: When we use our senses to gather information
observation
300
True/false: It is okay to perform lab work WITHOUT adult supervision if you are taking the necessary safety precautions (i.e. safety goggles, proper attire, being careful)
FALSE! You should NEVER perform lab work without adult supervision.
400
True or False: If a person is on fire, place the fire blanket on top of them
True
400
When might you need to do a new experiment? A. When the hypothesis is correct B. When you notice many sources of error in your original experiment. C. When the conclusion does not support the hypothesis
B and C
400
What are the variables that must be KEPT THE SAME throughout the experiment?
Controlled Variables (or controls)
400
What is the most important fact to remember about independent variables?
There can be only ONE!
400
When conducting an experiment, a scientist will collect and record ________
Data
500
True or False: Always carefully WAFT vapors toward your nose instead of deeply inhaling.
True
500
graphs, charts, and calculations are all examples of what?
Data
500
What do we call anything that can go wrong in an experiment (or interfere with the results)?
Sources of Error / Limitations
500
In an experiment, what do we call the group that is receiving the stimulus (special treatment)?
The experimental group
500
If you wanted to find out if people like flavored or plain water better, which type of water would be the CONTROL group?
The plain water