Scientific Method A series of steps designed to
- Slides: 17
Scientific Method A series of steps designed to solve a problem or learn more about the world around you.
Experiment l. A procedure carried out to test a hypothesis
Purpose l The goal or question of the experiment What temperature of water will make a denture tablet dissolve faster?
Independent Variable changed on purpose l The “cause” l There can only be one IV l The temperature of water that you put the denture tablet in l
Dependent Variable What happens in the experiment l A measurement (specific data) l The “effect” l This is a result of changing the independent variable. l How many minutes it takes for the denture tablet to dissolve l
Control Part of the experiment that is used as a comparison to see if there was an effect l Examples: putting a denture tablet in room temperature water (normal conditions)
Hypothesis l An educated guess about the outcome of an experiment. If (independent variable is changed) then (this is how the dependent variable will change). l If the temperature of water increases then the denture tablet will dissolve faster. l
Constants l Things that are kept the same. l Needed so that we get accurate results and only have one IV. For the denture tablet experiment: Same amount of water Same brand of denture tablet Same size beaker or container
Procedure l A series of steps in the experiment. l Should be able to repeated by more than one person
Repeated Trials l Doing an experiment more than once l Necessary to check for accurate results Do we get the same results each time? l
Conclusion l A final statement that compares the data to the hypothesis l Describes the results of the experiment
Example #1 Will a plant grow taller if it is given more fertilizer? What is the independent variable?
Example #1 Will a plant grow taller if it is given more fertilizer? What is the independent variable? IV = Amount of fertilizer
Example #1 Will a plant grow taller if it is given more fertilizer? What is the dependent variable?
Example #1 Will a plant grow taller if it is given more fertilizer? What is the dependent variable? DV = How tall the plant grows
Example #1 Will a plant grow taller if it is given more fertilizer? What are 3 constants for this experiment?
Example #1 Will a plant grow taller if it is given more fertilizer? What are 3 constants for this experiment? 1. Kind of plant 2. Amount of soil 3. Amount of water
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