Please Take Out The Following: 1.Pencil 2.Composition Books 3.Sponge Bob Worksheets.

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Presentation transcript:

Please Take Out The Following: 1.Pencil 2.Composition Books 3.Sponge Bob Worksheets

Scientific Method Review

Scientific Method Definition: An orderly procedure for solving problems

Problem Always stated as a question…What do you want to know? Example: Why does ice float?

Gather Information Collect information relating to the question. Example: Liquid type, temperature, make- up of ice, liquid density, etc.

pH of Each Substance 1.Vinegar: pH Hydrogen Peroxide: pH Isopropyl Alcohol: pH 7 4.Tap Water: pH

Hypothesis Educated guess or possible solution to the problem: If…Then…Because Good Example: “If the ice floats in water then the ice is less dense than the water because of the surface area to volume ratio (ice Vs. water) NOT a good Example: “I think ice floats in water because it is less dense than the water.”

Theory Most logical explanation for events that occur, but has not been proven time and time again. Give an example!

Law Theory that is proven true over and over again.

Variable Factor being tested in the experiment (What is being changed…I.V.) Example: Change type of liquid the ice floats on; Change type of liquid added to water (toothpaste or hair gel); Change temperature of water; etc.

Independent Variable The variable of the experiment that you change.

Dependent Variable The part of the experiment in which you use to measure your results (Can you measure your results?).

Control The experiment without the independent variable (same conditions without a change in the control)…used for comparison with the variables. Example: Same experiment using water, toothpick and staple (without detergent).

Constant The objects that stay the same throughout the experiment to get accurate results.

Data Tables Organize data into columns in your results portion (Microsoft Excel is good for this)

Graphs Display data that is easy to see results (e.g. bar graph, pie chart, line graph, etc.)…when would you use each of these?

Conclusion State whether our hypothesis is correct or incorrect and WHY. Example: “My hypothesis that the ice floated is due to the green liquid making the water less dense was correct because the detergent made the water less dense than the ice from molecular action between the two substances.”