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The effect of light on photosynthesis
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The Limiting Effect of Light Intensity on Photosynthesis
Aim: To investigate the limiting effect of light intensity on
photosynthesis.
Prediction: I predict that as the light source (desk lamp) is moved
closer to the pondweed (Elodea), the rate of photosynthesis will
increase therefore more oxygen will be produced creating more bubbles.
I believe this will happen
because when the light source is nearer to the plant more of the
plants
surface area is coming in to contact with the light from the desk lamp
therefore more photosynthesis will occur which will mean more oxygen
will be produced which will create more bubbles.
Plan:
[IMAGE]
Method:
I am going to collect my apparatus and set it up as in the diagram,
then I am going to fill the beaker with water. I will then set up desk
lamp in correct position (eg: 20cm away). I will cut a piece of elodea
5cm long with a Scapular and put it into the beaker of water. Before I
turn on the desk lamp I will observe the amount of bubbles the Elodea
produces with foil wrapped around the beaker and then again without
the foil. I will do this for 1 minute. Then I will turn on the desk
lamp and start the stop clock.
I will count the bubbles for the next minute and also make a note of
the change in volume.
I will repeat this for a distance of 10cm, 5cm and 2cm away. I will
record all my results in a table.
Equipment:
* Foil (used to filter the light)
* Stop clock
* Beaker
* Desk lamp
* One metre ruler stick
* Pondweed (Elodea)
* Water
* Scapular
To make my experiment safe I will:
* Follow lab safety rules (eg no running, bags under desks etc).
* Keep the desk lamp away from contact with water.
Thorough analysis of the graph displayed enough evidence suggesting that an increase in substrate concentration will increase the height of bubbles until it reaches the optimum amount of substrate concentration, resulting in a plateau in the graphs (figure 2). Hence; supported the hypothesis.
On the container, the researchers wrote down their first initial, last name and lab section. The researchers then poured spring water into the cylindrical container about halfway and then set it aside. Next, the researchers transferred the Planarian using a small plastic pipette into an empty petri dish filled with just enough water for the Planarian to swim around freely. After the successful transfer into the petri dish The researchers then measured how long the Planarian was using the unit millimeters.
Busy Bubbles is a smallish building considering all of the activity that goes on inside. The first thing you notice as you approach the building, are the standard car wash stalls. The functional appearance of the inside isn’t really surprising until you start to look around. The ordered green and white design on the wall seems a little at odds with the funky mismatched furniture, and the hodgepodge message board. Any one need a used truck or a new kitten? Maybe you would like to work out of your home? Or apply to be a foster care family? This board will cover any of your needs. The room appears a bit sterile, but there are little areas where you can’t miss the touch of humanity. Don’t forget to check the lost and found basket before you leave.
The Effect of Light Intensity on the Rate of Oxygen Production in a Plant While Photosynthesis is Taking Place
Test tube A will have a piece of potato which is this size. Test tube
An Analysis and Evaluation of Data from Photosynthesis Experiments Graph analysis This is my analysis for the investigation in to the affect of light intensity on the rate of photosynthesis to the Canadian pondweed, elodea. In the results the pattern is that when the light intensity is higher the readings are generally higher. On the graph the less the light intensity the lower the gradient of the curve. the equation for the photosynthesis process is; CO2 + 2H2O + Light Energy = =
4. Pour about 300mL of tap water into the beaker. Set up a hot-water bath using a hot plate, retort stand, and thermometer clamp. Alternatively, use a Bunsen burner, retort stand, ring clamp, thermometer clamp, and wire gauze.
* I will then use a small pile of books and set the ramp up at the
To make the test fair I will use the same amount of water and the leaf
The Effect of Light Intensity on Photosynthesis Of Elodea Canadensis Introduction I wanted to find out how much the light intensity affected the Photosynthesis in Elodea Camadensa. I decided to do this by measuring the amount of oxygen created during photosynthesis. Photosynthesis is the procedure all plants go through to make food. This process uses Carbon dioxide, water and light energy. It produces Oxygen and Glucose.
As I do this experiment the thing I am going to be changing is the
and alcohol which I am using is on a brick under a tripod. On the
Start with the hot water and first measure the temperature. Record it. 8. Then pour 40 ml into the beaker. You can measure how much water was used by looking at the meniscus.
Investigating the Effect of Light Intensity on Photosynthesis in a Pondweed Aim: To investigate how the rate of photosynthesis changes at different light intensities, with a pondweed. Prediction: I predict that the oxygen bubbles will decrease when the lamp is further away from the measuring cylinder, because light intensity is a factor of photosynthesis. The plant may stop photosynthesising when the pondweed is at the furthest distance from the lamp (8cm). Without light, the plant will stop the photosynthesising process, because, light is a limited factor. However once a particular light intensity is reached the rate of photosynthesis stays constant, even if the light intensity is the greatest.
An Experiment to Investigate the Effect of Light Intensity on the Rate of Photosynthesis. Introduction Photosynthetics take place in the chloroplasts of green plant cells. It can produce simple sugars using carbon dioxide and water causing the release of sugar and oxygen. The chemical equation of photosynthesis is: [ IMAGE ] 6CO 2 + 6H20 C 6 H12 O 6 + 6O2 It has been proven many times that plants need light to be able to photosynthesize, so you can say that without light the plant would neither photosynthesize nor survive.