What is Science?. Science is making sense of events in the natural world. Uses explanations gathered through observation, and experimentation to make.

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Presentation transcript:

What is Science?

Science is making sense of events in the natural world. Uses explanations gathered through observation, and experimentation to make predictions that can be tested.

Allows for change or modification of ideas as more evidence is gathered. Not able to answer all the questions in the universe, nor solve all the problems

How is it done? Careful observations Looking for patterns Determining consistency (does the event occur under the same conditions again and again?)

Parts of an experiment Controls-your comparison group Experimental group-what you do the experiment on Constants-what must remain the same and not change from group to group

Variables: independent is what the experimenter manipulates and controls dependent is what depends on the indep. variable being changed Data: Quantitative – numerical Qualitative - descriptive

Practice Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they’re supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks. 1. What is the control group? 2. Independent variable? 3. Dependent variable? 4. What should Smithers’ conclusion be? 5. How could this experiment be improved?

Another one Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower. 1.What was the initial observation? 2.Control Group? 3.Independent Variable 4.Dependent Variable 5.What should Homer's conclusion be?

and another Bart believes that mice exposed to radiowaves will become extra strong. He decides to perform this experiment by placing 10 mice near a radio for 5 hours. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. He found out that 8 out of 10 of the radiowaved mice were able to push the block away. 7 out of 10 of the other mice were able to do the same. 1. What is the control group? 2. Independent variable? 3. Dependent variable? 4. What should Bart’s conclusion be? 5. How could this experiment be improved?