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Inquiry: How do I design a controlled experiment? (identifying variables, controls and experimental groups) 1) Take out your homework # 9. Leave it on the table so we can come around and check it. You will be using that homework for today’s lesson.- Inquiry: How do I design a controlled experiment? (identifying variables, controls and experimental groups) 1) How is the height of a plant affected by the amount of water it receives? Variable Independ. 1) Am’t of sunlight [] 2) Type of plant [] 3)Final height of plant [] 4)Am’t of water it receives [ ] 5)Temperature of the water[ ] Depend. [] [] [] [] [] Constant [] [] [] [] [] Inquiry: How do I design a controlled experiment? (identifying variables) 1) Hypothesis: If trees have leaves, then birds nests will increase. Problem: What affect trees with leaves (independent), have on the amount of bird nests? (dependent)? Independent variable: trees with leaves . Dependent variable: birds nests. Affects Depends on Inquiry: How do I design a controlled experiment? (identifying variables) 2) Hypothesis: If chocolate is given to teachers, then amount of homework will decrease. Problem: What affect will giving chocolates (independent), have on the amount of homework teachers give? (dependent)? Independent variable: chocolates . Dependent variable: homework teachers give. Affects Depends on Inquiry: How do I design a controlled experiment? (identifying variables) 3) Hypothesis: If plants are watered, then growth height will increase. Problem: What affect will watering plants (independent), have on the height the plant grows? (dependent)? Independent variable: watering plant. Dependent variable: height plant grows. Affects Depends on Inquiry: How do I design a controlled experiment? (identifying variables) 4) Hypothesis: If acid rain is in water, then fish population will decrease. Problem: What affect will acid rain in water (independent), have on fish population? (dependent)? Independent variable: acid rain in water. Dependent variable: fish population. Affects Depends on Inquiry: How do I design a controlled experiment? (identifying variables) 5) Hypothesis: If calcium is given, then bone strength will increase. Problem: What affect will calcium (independent), have on bone strength? (dependent)? Independent variable: calcium. Dependent variable: bone strength. Affects Depends on Inquiry: How do I design a controlled experiment? (identifying variables) 1) Problem: What effect does high temperature have on radish germination? If I change the temperature by increasing it (independent), what affect will it have on radish germination (dependent)? Hypothesis: If I change the temperature by increasing it (independent), then radish germination will increase (dependent). Independent variable: the temperature. Dependent variable: radish germination. Affects Depends on Inquiry: How do I design a controlled experiment? (identifying variables) 2) Problem: What effect does studying with music have on student test scores? If I change how I study by studying with music (independent), what affect will it have on student test scores (dependent)? Hypothesis: If I study with music (independent), then my test scores will increase (dependent). Independent variable: the music. Dependent variable: test scores. Affects Depends on Inquiry: How do I design a controlled experiment? (identifying variables) 3) Problem: What effect does food coloring have on the amount of food fish eat? If I add food coloring (independent), what affect will it have on the amount fish eat (dependent)? Hypothesis: If food coloring is added (independent), then the amount that fish eat will decrease (dependent). Independent variable: the food coloring. Dependent variable: the amount fish eat. Affects Depends on Inquiry: How do I design a controlled experiment? (identifying variables) 4) Problem: What effect does light have on plant growth? If I change the amount of light (independent), what affect will it have on plant growth (dependent)? Hypothesis: If the amount of light is increased (independent), then plant growth will increase (dependent). Independent variable: the light. Dependent variable: plant growth. Affects Depends on Inquiry: How do I design a controlled experiment? (identifying variables) 5) Problem: What effect does smiling have on teacher giving no homework? If I change how the amount that I smile (independent), what affect will it have on teacher giving no homework (dependent)? Hypothesis: If I smile more (independent), then the teacher will still give homework (dependent). Independent variable: smiling. Dependent variable: teacher giving homework. Affects Depends on