Scientific Method A series of steps designed to

  • Slides: 17
Download presentation
Scientific Method A series of steps designed to solve a problem or learn more

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

Experiment l. A procedure carried out to test a hypothesis

Purpose l The goal or question of the experiment What temperature of water will

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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