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Hypothesis and Variables

Hypothesis and Variables. Step 3: Form a Hypothesis. Hypothesis - a testable explanation of an observation. A hypothesis is NOT just an educated guess about what you think will happen. It must be able to be tested!. Step 3: Form a Hypothesis. We write the hypothesis in an:

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Hypothesis and Variables

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  1. Hypothesis and Variables

  2. Step 3: Form a Hypothesis • Hypothesis- a testable explanation of an observation. • A hypothesis is NOT just an educated guess about what you think will happen. It must be able to be tested!

  3. Step 3: Form a Hypothesis • We write the hypothesis in an: • If-Then statement ex: If the amount of fertilizer is increased, thenthe height of the plant will increase.

  4. Types of Variables:

  5. The Independent Variable goes after the “If” I.V. Ifthe amount of fertilizer is increased, then the height of the plant will increase.

  6. The Dependent Variable goes after the “Then” If the amount of fertilizer is increased, thenthe height of the plant will increase. D.V.

  7. Now You Try: Example 1 If you spend more time studying, then your grade will improve. • Independent Variable = • Dependent Variable =

  8. Now You Try: Example 1 If you spend more time studying, then your grade will improve. • Independent Variable = amount of time spent studying • Dependent Variable = grade

  9. Now You Try: Example 2 If the temperature of the room is increased, then the bacteria will grow faster. • Independent Variable = • Dependent Variable =

  10. Now You Try: Example 2 If the temperature of the room is increased, then the bacteria will grow faster. • Independent Variable = temperature of room • Dependent Variable = bacterial growth

  11. Independent Variable: Cause • Dependent Variable: Effect

  12. Independent Variable vs. Dependent Variable

  13. Time to Practice!

  14. After all of the data from the experiment is collected, then its time to organize the data.

  15. Step 6: Organize your data • Put your data into a data table

  16. Step 6: Organize your data • Make the data table into a graph • GRAPHS make it EASIER to see patterns in the data!

  17. Step 6: Organize your data • How do you know what goes on each axis of the graph?

  18. Step 6: Organize your data • DRY MIX • Dependent Variable = Responding Variable = Y axis • Manipulated Variable = Independent Variable = X axis

  19. Parts of a graph Y Axis X Axis

  20. Parts of a graph Y Axis (Dependent Variable) X Axis (Independent Variable)

  21. Graphing: DRYMIX Dependent Variable Independent Variable

  22. Any Questions????

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