• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Which things affect the rate of photosynthesis?

Extracts from this document...

Introduction

Which things affect the rate of photosynthesis? Photosynthesis takes place in the leaves of a plant. In the leaf there are chloroplast, which contain chlorophyll. This chlorophyll absorbs the sun's sunlight. Photosynthesis needs to happen because plants depend on photosynthesis to grow. Also, humans and animals depend on the plants for oxygen. When plants photosynthesise they release oxygen into the air so we can respire. And the plants need us because when humans and animals respire they exhale carbon dioxide, which the plants need for photosynthesis. This is the word equation for photosynthesis: Sunlight Carbon Dioxide + Water Glucose + Oxygen Chlorophyll This is the chemical equation for photosynthesis: Sunlight 6CO2 + 6H2O C6H12O6 + 6O2 Chlorophyll What are the main things involved in photosynthesis? The things needed for photosynthesis are temperature, carbon dioxide, water, sunlight, and the chlorophyll found in the leaves. If any of these variables were increased, this would help by increasing the rate of photosynthesis. When the temperature increases, the enzymes in the plants will work faster therefore increasing the rate of photosynthesis occurring in the plant. ...read more.

Middle

By increasing the amount of carbon dioxide, water, and the amount of leaves on a plant, this could make photosynthesis occur faster. How will I do the experiment? To collect my results I must use the following equipment: * Beaker - to hold the water and the plant inside it * Test tube - to collect the oxygen which is to be released * Lamp - providing the light for the plant to photosynthesise * Ruler - measure the distance between the beaker and the lamp * Funnel - placed over the plant so that the oxygen that is produced does not get lost in the water * Stop clock - to record the time during the experiment Test tube Lamp Beaker Funnel Water plant Ruler Measurements I know that the rate of photosynthesis has changed because I will be monitoring the number of bubbles being released by the plant each minute. In my results table I will be writing the number of oxygen bubbles released by the plant. I will write down my results every minute. ...read more.

Conclusion

I did this investigation safely by not touching the lamp with wet hands, as this would have given me an electric shock, which could put my life at risk. I also made sure that the thermometer could not fall of the table causing it to break. Improvements to this investigation If I were to do this experiment again, I would improve it by allowing more time for the investigation to take place, so that more results will be colleted and that plants need more time to adapt to their surrounding. It will be measured every hour. I would also put scales on the test tube so that the volume of the oxygen bubbles would be measured. Further investigations Now that I done this investigation on effect of the amount of light intensity on the rate of photosynthesis, I could also find out about the amount of water given to the plant, the amount carbon dioxide or the temperature the plant is kept in. I would also find a number of plants that have the same number of leaves on them. To extend this, the plants will have the same surface area on the leaves. This would be an investigation to see whether a large surface area speeds up photosynthesis. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Green Plants as Organisms essays

  1. Marked by a teacher

    Factors That Affect the Rate of Photosynthesis

    3 star(s)

    After first test, repeat step 9 twice for accurate results. 11) When finished with the first distance, move lamp (with it on) and repeat step 9 and 10. Note down all results when experiment is finished. Obtaining Evidence --> Observation/Results (A)

  2. Investigating the effect of temperature on the rate of photosynthesis

    rate of photosynthesis with the amount of oxygen released by the elodea. This is because some of the oxygen in the elodea is used to allow the plant to respire. Respiration releases energy, of which is needed in photosynthesis. This means the oxygen released is only part of the oxygen

  1. An Investigation into Species Diversity with distance along a Pingo.

    46.28 48.29 2.01 48.02 0.27 13.43 8 45.30 46.77 1.47 46.48 0.29 19.73 9 45.51 50.27 4.76 48.21 2.06 43.28 A table showing the average light intensity at each zone along the pingo Zone Average recording at 10.15 /lux Average recording at 11.15 /lux Average recording at 12.15 /lux Overall

  2. How temperature affects the rate of photosynthesis.

    So, at approximately 38 oC the highest amount of oxygen would be released i.e. the largest length of air bubble would be measured as the rate of photosynthesis would be highest at this or around this temperature owing to the high amount of kinetic energy and increase in number of collisions between enzyme and substrate molecules.

  1. Absorption Spectrum of Chlorophyll.

    Chromatography is a technique for separating chemical substances. The separation of colored compounds on paper strips requires the use of a porous material that absorbs liquids and solutions (Figure 4). This material is known as the adsorbent and includes materials such as paper, silica gel and alumina.

  2. Factors That Affect Photosynthesis.

    Plant- Different species plants have different photosynthetic rates due to the different leaf structures of the plants. Even plants of the same species may have slightly different rates of photosynthesis since there may be more or less chlorophyll in the leaves to absorb light.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work