Scientific method
What is the first step of the scientific method?
Make observations and ask questions.
What is a conclusion?
Tell the results of your experiment and whether or not your hypothesis was proved true or false.
What is the independent variable?
The variable that a scientist changes during an experiment.
Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. Height of the trees is measured once a week. CV________________
The tree left outside in normal conditions
3 criteria for a hypothesis
What is testable, falsifiable, and can't be proven true?
What is the second step of the scientific method?
Research.
Why is it important to share results?
So other people will know the outcome of your experiment and won't repeat the exact same one.
What is the dependent variable?
The variable that is being measured or tested during an experiment.
Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. Height of the trees is measured once a week. IV___________ DV___________
IV: different humidity levels
DV: height of the trees
Charge on a proton.
What is a positive charge?
What is the third step of the scientific method?
Make a hypothesis.
What is a hypothesis?
An educated guess or prediction about what you think will happen in an experiment.
What is a controlled variable?
A variable or variables that stay the same during an experiment.
One tank of gold fish is fed the normal amount of food once a day, a second tank is fed twice a day, and a third tank four times a day during 6 weeks. The fish's weight is recorded daily. IV____________ DV____________
IV: number of feedings
DV: weight of fish
Water sticking to other molecules and substances.
What is adhesion?
What is the fourth step of the scientific method?
Collect materials and experiment.
Sometimes you must do ________________ to find out more information about your question.
research
What is a control group?
Baseline data for comparison
One tank of gold fish is fed the normal amount of food once a day, a second tank is fed twice a day, and a third tank four times a day during 6 weeks. The fish's weight is recorded daily. CV___________________
CV: the tank of fish fed the normal amount
Speeds up a chemical reaction
What is a catalyst?
What is the fifth step of the scientific method?
Analyze data.
What are variables?
Variables are factors that change during an experiment.
Type of data that uses numbers
Quantitative data
You decide to clean the bathroom once a day for two weeks. You notice that the shower is covered in a strange green slime. You decide to try and get rid of the slime by adding lemon juice. You spray half of the shower with lemon juice and spray the other half with water. You record how clean the shower is everyday. IV_____________ DV______________
IV: lemon juice or not
DV: cleanliness of shower
Many molecules put together.
What is a polymer?