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Aim: How can we design an experiment?

Aim: How can we design an experiment?. Do Now: Define Hypothesis. Ans. A tentative explanation to a phenomenon or a possible solution of a problem. Home work: Answer Questions 1 – 12 on page # 28. Design an Experiment.

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Aim: How can we design an experiment?

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  1. Aim: How can we design an experiment? • Do Now: Define Hypothesis. Ans. A tentative explanation to a phenomenon or a possible solution of a problem. • Home work: Answer Questions 1 – 12 on page # 28

  2. Design an Experiment • Many plants can affect the growth of other plants near them. This can occur when one plant produces a chemical that affects another plant. • Design an experiment to determine if a solution containing ground-up goldenrod plants has an affect on the growth of radish seedlings.

  3. Design an experiment • In your experimental design be sure to: • State a Hypothesis to be tested. • Radish seedlings grow faster when exposed to goldenrod solution. • Radish seedlings treated with the solution will not grow as tall as the control group. • The solution will not affect the height of radish seedlings.

  4. Design an Experiment • Describe how the experimental group will be treated differently from the control group. • The experimental group will be given the solution while the control group is given plain water. • The experimental group will have goldenrod plant in the soil.

  5. Design an Experiment • Explain why the number of seedlings used for the experiment should be large. • A large sample will increase the validity of the results. • Since some may die, there will be enough left to do the experiment.

  6. Design the experiment • Name some of the constants of the experiment. • Sunlight • The amount of water • The amount of air • The amount of soil • Temperature

  7. Design the experiment • Identify the type of data that will be collected based on the student’s hypothesis. • The number of the seedlings that survive in each group will be counted. • The height of the seedlings. • The distance between the plants. • The amount of the chemical released.

  8. Design the experiment • Describe the experimental results that would support the student’s hypothesis. • Radish seedlings exposed to goldenrod solution were twice as tall as the control group in two weeks. • If the radish seedlings treated with the solution do not grow as tall as those in the control group, the hypothesis is supported. • If there is no difference between the height of the group treated with the solution as compared to the control group, the hypothesis will be supported.

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