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

Factors affecting the rate of transpiration

Extracts from this document...


Factors affecting the rate of transpiration Results Conclusion Looking at the graph, we can recognize that as the distance between the lamp and the plant increases, the distance moved by the bubble decreases, making them inversely proportional; meaning that a decrease in light intensity reduces the rate of transpiration. This is in support of my earlier prediction that stated "...as I increase the light intensity on the plant, the faster it will transpire and take up water to replace the water lost". ...read more.


But my evidence also proves that the intensity of the light on the leaves, (and subsequently on the stomata) speeds up transpiration. This would be because the less concentrated the light is on the plant, the less stomata are stimulated to open and therefore the lesser surface area for the water to diffuse out of. Evaluation The results were all accurate and sufficient for arriving at my conclusion. ...read more.


If I had more time, I would investigate the distance traveled by the bubble over a longer period of time; or perhaps the time taken for the bubble to move a set distance. This is likely to improve the reliability of my evidence and the accuracy of conclusions drawn. To further develop my study of the factors affecting transpiration, I would have liked to investigate another of the various factors outlined in my plan. I would also be interested in investigating the specific effects that using the screen had, on the distance moved by the bubble in 1min. ...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. The investigation is aiming to look at transpiration.

    This increases the concentration of water vapour molecules in the air spaces of leaf producing greater water potential. This leads to an increase in water potential gradient between the leaf and the atmosphere, so water will diffuse out more rapidly.

  2. Factors Affecting Infiltration Rates

    The amount of decayed organic matter found at the soil surface can also enhance infiltration. Organic matter is generally more porous than mineral soil particles and can hold much greater quantities of water. The rate of infiltration normally declines rapidly during the early part of a rainstorm event and reaches a constant value after several hours of rainfall.

  1. Factors affecting the rate of transpiration

    The guard cell walls are unevenly thickened (seen on various scanning electron microscopes images). http://www.mcs.csuhayward.edu/sem/images/horsel4.gif The wall furthest from the pore (called the dorsal wall) is thinner than the wall next to the pore (the ventral wall). Also, the cellulose microfibrils that make up the walls are arranged so that the ventral wall is less elastic than the dorsal wall.

  2. Investigation of the factors affecting the rate of transpiration from a shoot of Privet.

    Therefore, I must make sure that all the other factors listed above are kept constant; as long as I use the same shoot, the stomatal density, surface area of the plant, and the species of plant will remain the same, and as long as I treat the plant properly (see method)

  1. Three separate experiments which are to be carried out to investigate a plant's unique ...

    Since water is the only thing that evaporates, I assume (I am in fact very sure) that the liquid will be water. Also, I know this because the plant will only give off what it extracts from the ground. Since we are simulating the ground with an evaporating dish of

  2. Factors affecting Germination

    alternate hypothesis is being accepted - full drainage provides better results than no drainage. In neither the acidic or basic vermiculite did the seeds successfully germinate so therefore a neutral pH level is ideal, proving the alternate hypothesis. In order to provide the most suitable, neutral, sterile environment for observing

  1. Factors Affecting Cooling

    This was because the biggest beaker had the most surface area touching the water. Therefore more water molecules could collide and touch the beaker. If molecules lost heat through convection and radiation through the glass then the more molecules touching the glass, the more radiation.

  2. Investigation Into The Rate of Water Uptake By Transpiration.

    Thus, transpiration will take place more rapidly in warm air. When the sun shines on the leaves, they will absorb heat as well as light. This warms them up and increases the rate of transpiration. Air movements - In still air, the region surrounding a transpiring leaf will become saturated

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