Science Safety
Should you ever taste anything during a lab?
NO!!
How do we phrase a hypothesis?
If... Then...
What is the independent variable?
The factor being changed.
What is the experimental group?
The group that is being experimented on/changed
Can you EVER just put the numbers from a data table on to the scale of a graph?
NO!!!
Is running, throwing things, or screaming ever allowed during a lab?
NO!!!
What is an inference?
A conclusion based on observations
What is the dependent variable?
The Data being measured
What is the purpose of the control group?
A comparison
Normal Conditions
No change
Where does the dependent variable go?
On the Y-axis
If you have long hair what should be done with it during a lab?
Tie back hair
What is a hypothesis for the following scientific problem:
Does a seed need sunlight to sprout?
If a seed is given sunlight then it will sprout.
What is a constant variable? Name two from the plant experiment that we have been doing.
Variables kept the same throughout an experiment.
Type of seeds, number of seeds, amount of water, type of soil, size pot etc.
What is the experimental group in this experiment?
We are studying wheater or not light affects plant growth
Plants in the dark
Where does the independent variable go?
On the x axis
If we are using chemicals what should you be wearing?
Goggles
What are the two types of observations? What is the difference between the two?
Qualitative - using your senses
Quantitative - using numbers
We are studying whether or not the amount of sun affects grass seed growth.
What is the independent variable in this experiment?
The amount of sun
What is the control group in this experiment?
We are studying wheater or not light affects plant growth
Plants in the light
Sketch out a data table (make a t) and label the location of the independent and dependent variables.
"ID" the data table
What is the best way to stay safe during a lab?
Follow directions!
How do we make an experiment better?
Only test one thing, repeat, add more test subjects
An experiment is studying the effectiveness of an antibiotic.
What is the dependent variable?
How many people get sick
What is wrong with this experiment?
A scientist studied the effectiveness of an antibiotic. One group got 1mg of the antibiotic the other group got 2mg of the antibiotic. After 10 days the scientist evaluated if the participants were still sick.
There is no control group
A group given no antibiotics
What do you need to do to a scale of a graph?
Count by something
Make it even
Skip the same number of boxes