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Name: ________________

Factors Affecting the Rates of Photosynthesis and Cellular Respiration

Photosynthesis:

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1) What happens to the rate of photosynthesis as light intensity increases?

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2) Why does the rate of photosynthesis level off, even as light intensity continues to increase?

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3) What happens to the rate of photosynthesis as carbon dioxide concentrations increase?

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4) Is carbon dioxide a reactant or product of photosynthesis? ____________________________

5) What would happen to the rate of photosynthesis if carbon dioxide were removed from the plant’s environment?

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6) Describe what happens to the rate of photosynthesis as temperature increases.

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7) Explain why the rate of photosynthesis decreases at high temperatures.

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Respiration:

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8) What is happening to the rate of cellular respiration as light intensity increases?

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9) Explain your answer to #8 citing evidence from the equation for cellular respiration.

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Respiration:

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10) The graph above shows the change in oxygen levels over time during cellular respiration. Is cellular respiration absorbing or releasing oxygen? Justify your answer with evidence from the graph.

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Analysis:

11) If a nuclear explosion blocked the sun’s rays from reaching earth, explain the potential effects. Use evidence from the graphs in this packet.

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12) What would happen to a cell if its mitochondria were removed?

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13) Do plants have mitochondria?

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14) Do plants do cellular respiration? Use your answer to #13 to help explain your answer.

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15) Using information from this packet, explain why many environmentalists protest chopping down rainforests.

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|No Work Completed |Apprentice |Expert |Master |

|Photosynthesis Graph questions |At least 4 photosynthesis graph|At least 5 photosynthesis graph|All photosynthesis graph |

|not done (#1-7) |questions correctly and |questions correctly and |questions correctly and |

| |completely answered (#1-7) |completely answered (#1-7) |completely answered (#1-7) |

| |3 pts |6 pts |8 pts |

|0 pts | | | |

|Respiration Graph questions not|At least 1 respiration graph |At least 2 respiration graph |All respiration graph questions|

|done (#8-10) |question correctly and |questions correctly and |correctly and completely |

| |completely answered (#8-10) |completely answered (#8-10) |answered (#8-10) |

| |3 pts |6 pts | |

|0 pts | | |8 pts |

|Analysis Questions not done |At least 3 analysis question |At least 4 analysis questions |All analysis questions |

|(#11-15) |correctly and completely |correctly and completely |correctly and completely |

| |answered (#11-15) |answered (#11-15) |answered (#11-15) |

| |3 pts |6 pts |9 pts |

|0 pts | | | |

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