Question

Aquatic plant emits bubbles of oxygen when placed under a bright light. The table shows the results of an experiment to show the effect of light intensity on bubble production. Use the data in the table to answer the question.

Oxygen Production
Distance From Light (cm)
Bubbles Produced per Minute
10
39
20
22
30
8
40
5


Distance From Light (cm)
10
20
30
40
​

Oxygen Production
Bubbles Produced per Minute
39
22
8
5
​


What conclusion about photosynthesis is supported by the evidence from this experiment? Explain your reasoning.

Answer 1

more light means more photosynthesis means more oxygen

closer to light the more oxygen is produced

distance from light & oxygen produced is in an inverse relationship which means when one goes up the other goes down

According to the data on the table, when the distance from the light increased, the bubbles produced per minute have decreased. The relationship between the two variables shows an inverse one. This means that if one variable increases, then the other one decreases, and vice-versa. Using this information, we can conclude that when the aquatic plant is placed far from light, it gets less sun exposure. This affects the rate of photosynthesis, including its by-products. When the rate of photosynthesis is slow, the oxygen produced as a waste product is also low.

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