BS101 Unit 4 Short Answer Question (SAQ)
Lesson 4 Laboratory: Photosynthesis
Introduction: Elodea is a species of aquatic plant often called waterweed. Like other plants, Elodea absorbs carbon dioxide and releases oxygen during photosynthesis.
In this lab, an Elodea specimen is submerged in water under a lamp with a filter that can change the color of the light. We will measure Elodea's rate of photosynthesis by measuring the amount of oxygen it produces. We will investigate the effects of light color and light intensity on Elodea's rate of oxygen production.
Baking soda (sodium bicarbonate, Na HCO3) breaks down to release CO2 when mixed with water, so adding it to the water increases the availability of CO2.By placing the Elodea plant into water containing varying levels of baking soda, we can also investigate the effect of carbon dioxide availability on the rate of photosynthesis.
Hypothesis & Prediction: A hypothesis is a testable statement that explains what will happen with a reason. A prediction is what you think will happen.
TYPE CORRECT ANSWER HERE
1. Make a prediction about which light color (red, blue, green, or colorless) will result in the highest photosynthesis rate.
Red and blue colour light will result in the highest photosynthesis rate.
The graph below shows the rate of photosynthesis versus wavelength of light incident.
The graph show that most of the photosynthesis takes place in the blue and red regions of the spectrum
2. Predict whether the rate of the photosynthesis will be highest at:
A. low intensity of light
B. medium intensity of light
C. high intensity of light
The rate of photosynthesis will be highest at high intensity of light.
The plateau indicates that after a steady increase the rate is unaffected because the chlorophyll molecules lose their excitability.
3. Based on what you already know about photosynthesis, write a testable hypothesis to explain the influence of an increase in light intensity on the photosynthetic rate in tomato leaves.
Introduction: Elodea is a species of aquatic plant often called waterweed. Like other plants, Elodea absorbs carbon dioxide and releases oxygen during photosynthesis.
In this lab, an Elodea specimen is submerged in water under a lamp with a filter that can change the color of the light. We will measure Elodea's rate of photosynthesis by measuring the amount of oxygen it produces. We will investigate the effects of light color and light intensity on Elodea's rate of oxygen production.
Baking soda (sodium bicarbonate, Na HCO3) breaks down to release CO2 when mixed with water, so adding it to the water increases the availability of CO2.By placing the Elodea plant into water containing varying levels of baking soda, we can also investigate the effect of carbon dioxide availability on the rate of photosynthesis.
Hypothesis & Prediction: A hypothesis is a testable statement that explains what will happen with a reason. A prediction is what you think will happen.
TYPE CORRECT ANSWER HERE
1. Make a prediction about which light color (red, blue, green, or colorless) will result in the highest photosynthesis rate.
Red and blue colour light will result in the highest photosynthesis rate.
The graph below shows the rate of photosynthesis versus wavelength of light incident.
The graph show that most of the photosynthesis takes place in the blue and red regions of the spectrum
2. Predict whether the rate of the photosynthesis will be highest at:
A. low intensity of light
B. medium intensity of light
C. high intensity of light
The rate of photosynthesis will be highest at high intensity of light.
The plateau indicates that after a steady increase the rate is unaffected because the chlorophyll molecules lose their excitability.
3. Based on what you already know about photosynthesis, write a testable hypothesis to explain the influence of an increase in light intensity on the photosynthetic rate in tomato leaves.