Scientific Method A series of steps designed to solve a problem or learn more about the world around you.

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Presentation transcript:

Scientific Method A series of steps designed to solve a problem or learn more about the world around you.

Experiment A procedure carried out to test a hypothesis

Purpose Do raisins or spaghetti move more in Sprite? The goal or question of the experiment Do raisins or spaghetti move more in Sprite?

Independent Variable changed on purpose The “cause” There can only be one IV Examples: the temperature of water the brand of diapers Spaghetti or raisins

Dependent Variable What happens in the experiment A measurement The “effect” This is a result of changing the independent variable. Examples: time for denture tablet to dissolve, amount of water absorbed How many times the spaghetti or raisins moved to the top

Hypothesis An educated guess about the outcome of an experiment. If (independent variable is changed) then (this is how the dependent variable will change).

Constants Things that are kept the same. Needed so that we get accurate results and only have one IV. Examples: amount of water or Sprite in beaker, size of diapers

Procedure A series of steps in the experiment. Should be able to repeated by more than one person

Repeated Trials Doing an experiment more than once Necessary to check for accurate results Do we get the same results each time?

Conclusion A final statement that compares the data to the hypothesis 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 IV = Amount of fertilizer 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 DV = How tall the plant grows 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? Kind of plant Amount of soil Amount of water