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Effects of different colors of light on plant growth.

Follow in the steps of van Helmont, John Woodward, Joseph Priestley and Jan Ingenhousz and discover photosynthesisIs plant growth affected by exposure to ultraviolet light?

The effect of light on seed germinationWhat is Transpiration?
Photo provided by Flickr

Variables The input variable which will be used in this investigation will be the light intensity (this will be a 100Watt bulb being moved closer and further away from the plant)....

Effect of different colors of light on the rate of photosynthesis.

How does light intensity and duration affect the rate of photosynthesis?
Photo provided by Flickr

Introduction: "Photosynthesis is the conversion of light energy to chemical energy that is stored in glucose or other organic compounds; it occurs in plants, algae, and certain prokaryotes" (Campbell, G-16).

When photosynthesis takes place, plants use the suns energy to combine carbon dioxide from the air with water from the soil to create glucose (a carbohydrate)....

Investigate the effect of light on seed germination.

In this experiment we were told that we would be measuring the rate of photosynthesis.
Photo provided by Flickr



Improved Experiment

Prediction

I predict that the rate of photosynthesis will increase until other
limiting factors run out.



I would also test more voltages of light to widen the results of the
experiment, thus creating a clearer picture of how the light intensity
is affecting the plant.

Photosynthesis need light to work, so light therefore should speed up the rate of photosynthesis.
Photo provided by Flickr
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Effects of different colors of light on the photosynthesis rate.

Light is a very important factor in the rate of photosynthesis, in my project I am going to test that plants do need light in order to photosynthesise.

Time (min.) Rate of Photosynthesis

Furthermore, I predict that if the light intensity increases, the rate of photosynthesis will increase at a proportional rate and more oxygen will be produced and therefore the oxygen levels will increase.

I will vary the light intensity in the experiment.



Conclusion

I have realised in this experiment that without the products of
photosynthesis all living organisms would die, including plants as
eventually the limiting factors would run out such as carbon dioxide.

How does the level of light affect the rate of photosynthesis



Results

Amount of oxygen (mm³ )

Test 1

Test 2

Test 3

Average

Voltage (V)

Light Intensity (lux)

3.14

3.95

1.57

2.88

4

21

4.71

3.14

2.36

3.4

5

103

3.14

2.36

1.57

2.36

6

190

3.14

3.14

2.36

2.88

7

346

1.57

1.96

2.36

1.96

8

422

1.57

1.57

3.14

2.09

9

680

3.53

2.36

3.95

3.27

10

1485

5.5

3.95

3.95

4.45

11

1770

10.6

11

11

10.87

12

1960

14.14

12.57

10.21

11

13

6660

Evaluation

I think that this experiment is much more accurate than the
preliminary experiment, due to the fact that the preliminary
experiment was very simple.

Photo - Light Intensity | Photosynthesis | Glasses

It will be very interesting to see how light will influence the rate of photosynthesis in plants and what will happen if they do not get the required light in order to produce starch .

factors that affect photosynthesis | Photosynthesis | Light

I think this because the plant may use up all of the carbon dioxide (Sodium hydro carbonate) and the plant can have as much light as it needs but if it does not have any carbon dioxide it will not be able to photosynthesise....

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