What is the hypothesis for photosynthesis investigation?
HYPOTHESES: In this exercise, the experimental hypothesis is that the leaf discs will have a greater rate of photosynthesis in the bicarbonate solution, because bicarbonate provides added CO2 to fuel photosynthesis, causing more leaf discs to float.
How do you show photosynthesis in an experiment?
Use a measuring spoon to scoop out 1/8 teaspoon of baking soda, and fill your measuring cup with 300 milliliters of water. Mix the baking soda into the water to create your bicarbonate solution. When the baking soda dissolves in the water, it releases carbon dioxide. This will be used by the spinach for photosynthesis.
What is the dependent variable in photosynthesis experiment?
Independent variable: the light intensity (how close the light is). Dependant variable: the number of oxygen bubbles given off (the rate of photosynthesis).
How do you measure photosynthesis?
Commercial Instruments. Gas exchange is used most often as the way to measure photosynthesis, and there are a few different techniques. CO2 measurement uses infrared light, while O2 measurement requires electrochemical sensors. Infrared Gas Analyzer: CO2 absorbs infrared light.
What are the reactants of photosynthesis?
The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2. This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.
How do you calculate ET50?
What was the ET 50light for this trial? To determine the ET50-light for this trial, plot the percent leaf disk floating as a function of time: From the above graph, we can interpolate that 50% of the leaf disks floated at 5.5 minutes. Therefore, the ET50-light is 5.5 minutes.
What is the process of photosynthesis?
Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
How do you identify a controlled variable?
What is a control variable? A control variable is any variable that’s held constant in a research study. It’s not a variable of interest in the study, but it’s controlled because it could influence the outcomes.
What is the purpose of photosynthesis lab?
How does the suction help the leaf disks to sink?
Why is spinach used in photosynthesis lab?
Charge separation. It takes about one-third of a second to blink your eye. Charge separation happens in roughly one-hundredth of a billionth of that amount of time.
What are the results of photosynthesis?
Photosynthesis is a process which synthesizes carbohydrates ( glucose) from water and carbon dioxide, utilizing the energy from sunlight by green plants, algae, and cyanobacteria. As a result of photosynthesis, gaseous oxygen is released to the environment. It is an extremely important process for the existence of life on earth.
How do you measure the rate of photosynthesis?
– Set up the apparatus as in the diagram. – Leave for five minutes for the pondweed to acclimatise to the new light intensity. – Count the number of bubbles given off in one minute. – Move the light 10 cm further back. – Leave for five minutes for the pondweed to acclimatise again.