Question

1. read the sample lab summary below. then write a cer (claim - evidence - reasoning) statement for what you learned about how light intensity affects the rate of photosynthesis in aquatic plants. (3 pts)

lab summary
guiding question: how does light intensity affect the rate of photosynthesis in aquatic plants?
objective: to determine how varying light intensities will affect the rate of photosynthesis in aquatic plants.
overview: elodea, an aquatic plant, was placed in various beakers of water and sodium bicarbonate solution. the sodium bicarbonate solution provides carbon dioxide for the plant, a key ingredient in photosynthesis. lamps with varying light bulb intensities were placed over each beaker. every minute, the number of bubbles produced was recorded in the data table below. the bubbles were a sign of oxygen being made as a result of photosynthesis happening.
data:

light intensity (lux)	bubbles produced per minute
1,000	10
1,500	15
2,000	20
2,500	23

on your answer sheet, write a cer (claim - evidence - reasoning) statement for what you learned about how light intensity affects the rate of photosynthesis in aquatic plants.

Explanation:

Step1: Identify the claim

The rate of photosynthesis in aquatic plants increases as light intensity increases.

Step2: Present the evidence

As light intensity goes from 500 lux to 2500 lux, the number of bubbles produced per minute increases from 5 to 23.

Step3: Provide the reasoning

The bubbles are a sign of oxygen production during photosynthesis. As light intensity rises, more energy is available for the photosynthetic process, leading to an increase in the rate of photosynthesis and thus more oxygen - and more bubbles - being produced.

Answer:

Claim: The rate of photosynthesis in aquatic plants increases as light intensity increases.
Evidence: When light intensity is 500 lux, 5 bubbles are produced per minute; at 2500 lux, 23 bubbles are produced per minute.
Reasoning: More light intensity provides more energy for photosynthesis, resulting in more oxygen production (bubbles).