scientific method. steps in the scientific method 1. make observation. 2. ask question. 3. make a...
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Scientific Method
Steps in the Scientific Method
1. Make Observation.
2. Ask Question.
3. Make a hypothesis.
4. Test your hypothesis.
5. Analyze the results.
6. Draw conclusions. (infer!)
Experimental Design Who has ever done a science fair
experiment? What are the important parts?
Control group Experimental group Variables
Independent Dependent
Experimental Design Control group, what is it?
The group that remains constant, unchanged It is the STANDARD that the experimental
groups are compared to
Experimental group, what is it? The group that has some changed variable
Experiments Hypothesis: If Miracle Gro is added to
bean plants, then they will grow taller. 2 groups
Bean plants without Miracle Gro Bean plants fed with Miracle Gro
Which is the control group? Which is the experimental group?
- CONTROL
- EXPERIMENTAL
ExperimentsVariables Independent
The variable that YOU CHANGE or MANIPULATE Do you guys and girls still “IM” each other?
Dependent The variable that you OBSERVE. It
RESPONDS/REACTS. Dr
Why is it a good idea to only change ONE variable during an experiment???
Constants Things that should remain the same
throughout the experiment. Bean Plant Type Number of Bean Plants in control and
experimental group. Amount of water Amount of Sunlight Think of any others????
ExperimentsBack to are Miracle Gro experiment… Data:
What is the Independent Variable? Adding Miracle Gro
What is the Dependant Variable? plant height
Control Experimental
Day 1 4.0 cm 7.5 cm
Day 2 5.0 cm 8.0 cm
Day 3 5.5 cm 9.0 cm
When Graphing IV – on X axis DV – on Y axis
Title: The Effects of the IV on the DV OR
The Relationship between the IV and the DV OR
DV vs. IV
Another Example Hypothesis:
If popcorn kernels are stored in the freezer, then all the kernels will pop.
Control Group?
Experimental Group?
Constants?
Independent Variable?
Dependent Variable?
Which is on the X axis? Y axis?
How do you title graph?