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Light intensity and the inverse square law

Quiz by Oak National Academy: GCSE Biology AQA Foundation

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6 questions
Show answers
  • Q1
    In what way does light intensity affect the rate of photosynthesis in plants?
    light intensity has no effect on photosynthesis
    the effect of light intensity varies with plant species
    higher light intensity decreases the rate of photosynthesis
    higher light intensity increases the rate of photosynthesis
    30s
  • Q2
    What is the relationship between light intensity and the rate of photosynthesis?
    the rate increases with light intensity up to a point, then plateaus
    light intensity has no effect on the rate of photosynthesis
    the rate increases indefinitely with increasing light intensity
    the rate decreases as light intensity increases
    30s
  • Q3
    Why does light intensity decrease as the distance from the light source increases?
    because the same amount of light is spread over a larger area
    because light energy is absorbed by the air
    because the power of the light source decreases
    because light waves change direction
    30s
  • Q4
    What is the inverse square law?
    the intensity of light is directly proportional to the distance from the source
    the intensity of light remains constant regardless of distance
    the intensity of light is inversely proportional to the square of the distance
    the intensity of light increases with the square of the distance
    30s
  • Q5
    What would happen to the light intensity if the distance from the light source is tripled?
    it becomes one-third
    it remains the same
    it becomes one-ninth
    it becomes one-sixth
    30s
  • Q6
    What is the relationship between the rate of photosynthesis and the distance from a light source?
    rate is inversely proportional to the distance from the light source
    rate is directly proportional to the distance from the light source
    rate is not related to the distance from the light source
    30s

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