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Question: What effect does light have on photosynthesis? Hypothesis: Relative to the question posed, what is your hypothesis? • We hypothesize that: Prediction: If your hypothesis is true, what do you expect to occur? • We predict that if: Experimental Design: • The independent variable that was manipulated (varied among treatments) was: • The standardized variables that were kept the same across all treatments were: • The dependent variable that was measured was: • Describe treatment groups. ? Plants in the experimental group were subjected to: ? Plants in the control group were subjected to: Data Collection: Record your results in Table 7.4. Table 7.4 The effects of light on photosynthesis and subsequent changes in the color of Phenol Red. Observations | Water Plant¹ + Phenol Red | Phenol Red | | Light | Dark | Light | Dark Starting Color (after adding CO?) | Orange- Yellow (Light Yellow) | Orange- Yellow (Light Yellow) | Orange- Yellow (Light Yellow) | Orange- Yellow (Light Yellow) Ending Color | Orange- Pink (Light Pink) | Yellow (Dark Yellow) | Orange- Yellow (Light Yellow) | Orange- Yellow (Light Yellow) Any Gas Bubbles Observed? | Yes | No | |

          Question: What effect does light have on photosynthesis?
Hypothesis: Relative to the question posed, what is your hypothesis?
• We hypothesize that:
Prediction: If your hypothesis is true, what do you expect to occur?
• We predict that if:
Experimental Design:
• The independent variable that was manipulated (varied among treatments) was:
• The standardized variables that were kept the same across all treatments were:
• The dependent variable that was measured was:
• Describe treatment groups.
? Plants in the experimental group were subjected to:
? Plants in the control group were subjected to:
Data Collection: Record your results in Table 7.4.
Table 7.4 The effects of light on photosynthesis and subsequent changes in the color of Phenol Red.
Observations | Water Plant¹ + Phenol Red | Phenol Red
| | Light | Dark | Light | Dark
Starting Color (after adding CO?) | Orange- Yellow (Light Yellow) | Orange- Yellow (Light Yellow) | Orange- Yellow (Light Yellow) | Orange- Yellow (Light Yellow)
Ending Color | Orange- Pink (Light Pink) | Yellow (Dark Yellow) | Orange- Yellow (Light Yellow) | Orange- Yellow (Light Yellow)
Any Gas Bubbles Observed? | Yes | No | |

Question: What effect does light have on photosynthesis?
Hypothesis: Relative to the question posed, what is your hypothesis?
• We hypothesize that:
Prediction: If your hypothesis is true, what do you expect to occur?
• We predict that if:
Experimental Design:
• The independent variable that was manipulated (varied among treatments) was:
• The standardized variables that were kept the same across all treatments were:
• The dependent variable that was measured was:
• Describe treatment groups.
? Plants in the experimental group were subjected to:
? Plants in the control group were subjected to:
Data Collection: Record your results in Table 7.4.
Table 7.4 The effects of light on photosynthesis and subsequent changes in the color of Phenol Red.
Observations | Water Plant¹ + Phenol Red | Phenol Red
| | Light | Dark | Light | Dark
Starting Color (after adding CO?) | Orange- Yellow (Light Yellow) | Orange- Yellow (Light Yellow) | Orange- Yellow (Light Yellow) | Orange- Yellow (Light Yellow)
Ending Color | Orange- Pink (Light Pink) | Yellow (Dark Yellow) | Orange- Yellow (Light Yellow) | Orange- Yellow (Light Yellow)
Any Gas Bubbles Observed? | Yes | No | |

Added by Hector F.

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