scientific method & lab safety. what is the scientific method? a series of logical steps to...
TRANSCRIPT
Scientific Method
&
Lab Safety
What is the Scientific Method?
A series of logical steps to follow in order to solve problems
Steps to Scientific Method
ObserveForm a questionForm Hypothesis
Educated guess or possible answer to your question
Test Hypothesis with an ExperimentCollect & Interpret DataForm a Conclusion
Observations…
ColorShapeFunction – what is it used for?Composition – what is it made of?PatternScaleTextureSizeSmell
Forming a Question?
You should be able to scientifically investigate your question
Does adding sugar to water keep flowers fresh?
Forming a Hypothesis
This is your explanation of your observations
A day after a picnic you look inside your cooler that was filled with ice and soda. You notice there is now only water and a regular soda can is at the bottom while a diet soda is floating…why?
Hypothesis: If….then statement
Carbonated WaterAspartameCarmel ColorNatural Flavor
Carbonated WaterSucroseCarmel ColorNatural Flavor
CONTROLLED Experiment
Variables – ANYTHING that can change an experiment
In an experiment, you want only 1 variable to change. The rest of the variables should remain the same.
This makes any change in the experiment due to that one variable.
Will houseplants grow faster if you make the room warmer?
What is the variable you want to change?
Temperature
What variables will remain unchanged?
Light, container, size, water
Measurements
SI Units Used by all scientists for consistency & it makes
sharing data easier
Organizing Data … Graphs
3 main types of graphs
Circle
Bar
LineDOT TO DOTBEST FIT
Conclusion
Explain data
Was your hypothesis supported or rejected?
Explain reasons for you results
Clothing & Shoes
Wear appropriate clothing and shoesNo sandals or
opened toed shoesNo dangling
necklaces or earrings.
Tie long hair back.
The Gear
Always wear an apron, gloves, and goggles
Lab Stations
Keep them neat!
Do not bring items not needed
Don’t leave trash in the cubbies!
Be Prepared!
Read all the instructions and know what you are supposed to do BEFORE you start the lab.
Be Careful!
Pay attention to what you are doing and where you are going.
Breakables
Glass should be placed in the broken glass container
Chemicals may need to be cleaned with a spill kit
FIRE!!!
Know where the fire extinguisher, fire blanket, and shower are located
Know how to use them!
EYES
They’re important and you don’t want to lose them!
Eye wash station Use if you get
chemicals in your eyes
15 minutes minimum