The Effect of Light on Photosynthesis
Aim:My aim was to investigate how light affected photosynthesis.
Prediction:My prediction is that the closer the weed is to the light
the faster the photosynthesis as light acts as a catalyst which speeds
it up.
Bibliography: For my work I used the internet and certain science
books for info.
Hypothesis:Photosynthesis is a process by which green plants and
certain other organisms use the energy of light to convert carbon
dioxide and water into the simple sugar glucose. In doing so,
photosynthesis provides the basic energy source for virtually all
organisms. An extremely important by product of photosynthesis is
oxygen, on which most organisms depend.
Factors that affect Photosynthesis
· Light affects the rate of photosynthesis, it is the main energy
source, and this is what we are testing in this investigation.
· Carbon Dioxide is a raw material which affects the rate of
photosynthesis
· Water also affects the rate of photosynthesis; this water mostly
comes from the roots.
· Chlorophyll is the miracle molecule which actually makes
photosynthesis
The word equation for photosynthesis is:
Carbon Dioxide + Water Light Glucose + Oxygen
[IMAGE] 6CO2 + 6H2O Chlorophyll C6H12O6 + 6O2 + Energy
Things needed for Photosynthesis
· Light
· Carbon Dioxide
· The right Temperature
Apparatus: For my experiment I will need:
· A boiling tube
· Water
· A spatula
· Sodium Hydrogen Carbonate
· A beaker (200ml)
· A lamp (240v)
· Pond weed
· A ruler
· A stopwatch
Method:
1. First I took a boiling tube and I filled ¾ of it with water,
2. Then I added ½ a spatula of sodium hydrogen carbonate to the water
and mixed it, this is so it has carbon dioxide in the water.
3. Then I placed a piece of pond weed inside the boiling tube and left
it for 1 minute to let it get used to its surroundings.
7.) After you have heated them to the right temperatures, pour the excess water into a dry evaporating dish. ( Be sure not to get any of the substance in your solution. )
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.
First we turned on the electric stove and placed the water container that was about two thirds full on the stove so the water could boil.
at the small end of the axis to see a more reliable pattern. I could
This shows that there could be three variables in this experiment, carbon dioxide, water and light energy. So in our case the variable light energy (light intensity) will be used. The equation also shows that if there is more light energy then more glucose and oxygen will be produced.
The Effect of Light Intensity on the Rate of Oxygen Production in a Plant While Photosynthesis is Taking Place
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 = =
Investigating the Link Between Wavelength of Light and Rate of Photosynthesis PROBLEM = = = = =
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.
Wait until the water boils and record the temperature to make sure that it is 100 degrees
The Effect of Light Intensity on the Rate of Photosynthesis in an Aquatic Plant Introduction The input variable I will be investigating is light, as light is just one of the 4 factors required in the green-plant process of photosynthesis. Photosynthesis is the process by which green-plants use sunlight, carbon dioxide, water & chlorophyll to produce their own food source. This process is also affected by the temperature surrounding the plant (the species of plant we experimented with, pond weed, photosynthesised best at around 20 degrees centigrade.) Light, temperature & CO2 are known as limiting factors, and each is as important as the next in photosynthesis. Light is the factor that is linked with chlorophyll, a green pigment stored in chloroplasts found in the palisade cells, in the upper layer of leaves.
2. A test tube was then filled with 35ml of yeast and placed in the
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.
Experiment #1: The purpose of this experiment is to investigate the effects of baking soda and light intensity on the rate of photosynthesis of green spinach leave through the observation of floating disk.