Scientific method
What is the first step of the scientific method?
Make observations and ask questions.
In which step of the scientific method do you state if the experiment proved or disproved your hypothesis?
Data and Conclusion
On which axis should you graph the independent variable?
X axis
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 tree is measured once a week. CV________________
CV: the tree left outside in normal conditions
Lisa is working on a science project. Her task is to answer the question: "Does Rogooti (which is a commercial hair product) affect the speed of hair growth?" IV_____________ DV_____________
IV: using Rogooti
DV: speed of hair growth
How many independent variables should be tested during an experiment?
One
What should you do if you need more information or the definition to a word in your question?
Research
On which axis should you graph the dependent variable?
Y axis
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 tree
Justin usually blows his nose using Kleenex tissues. His snot keeps leaking through the tissue. He decided he is going to create an experiment to find out if there is something better. What is his dependent variable?
DV: amount of snot leakage
What should you do while conducting your experiment?
Collect data
What is a hypothesis?
A guess or prediction about what will happen in an experiment.
What is a controlled variable?
A variable that stays 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: amount of food
DV: weight
Justin usually blows his nose using Kleenex tissues. His snot keeps leaking through the tissue. He decided he is going to create an experiment to find out if there is something better. What is his dependent variable? IV_______________
IV: different types of tissue used
It is Ok if your hypothesis was proven incorrect. True or false
True
Which type of variable is deliberately changed by the scientist?
Independent or manipulated
Different types of rose bushes are grown in a green house for two months. The number of flowers on each bush is counted at the end of the experiment. IV__________ DV__________
IV: type of bush
DV: number of flowers
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 with the normal amount of food
Mr. McNiece wanted to see how different types of music affected students' pulse rates. She played different types of music: heavy metal, rap, R&B, alternative, pop, country, and classical music. IV________________ DV______________
IV: different types of music played
DV: pulse rates of students
What is the last step of the scientific method?
Write a report and share your results.
Which type of variable is one being measured or tested?
Dependent or responding
Different rose bushes are grown in a green house for two months. The number of flowers on each bush is counted at the end of the experiment. CV______________
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: using lemon juice to clean shower
DV: removal of slime
Nick wanted to see how high an ice cube would float in different temperatures of water. IV_____________ DV_____________
IV: temperatures of water
DV: height of ice cube in water