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

Effect on temperature on the rate of transpiration of HIbiscus sp

Extracts from this document...


Design lab for the IB Internal Assessment Background information According to "ATMOSPHERIC SCIENCES", transpiration is the evaporation of water into the atmosphere from the leaves and stems of plants. Plants absorb soil water through their roots and this water can originate from deep in the soil. Plants pump the water up from the soil to deliver nutrients to their leaves. This pumping is driven by the evaporation of water through small pores called "stomates", which are found on the undersides of leaves. ASPECT 1 Research question The effect of temperature on the rate of transpiration of Hibiscus sp? Hypothesis If the temperature increases, then the rate of transpiration will increase as well as the rate of diffusion between the air spaces inside the leaf and the air outside. ...read more.


Light intensity Use the same light bulb and keep the distance between the light and the photometer constant in all the experiments. Potometer Use the same potometer in order to prevent any anomalies. Moreover, the water syringe and the tube placed in the potometer should also be the same, so the volume of the water can be kept constant. Time The time to equilibrate and the time in measuring the air bubbles should be the same for all the experiments. Materials - Potometer - Plant specimen - Incubator - Stopwatch - Ruler - Water Procedure 1. Make sure experimenters use the same room during the experiment, in order to have a constant wind speed and humidity. ...read more.


10. Repeat steps 1 to 9, changing the water temperature in the incubator to 15�C, 25�C, 35�C and 45�C. Ensure that all the other variables are kept constant ASPECT 3 Data Collection The effect of temperature on the rate of transpiration of Hibiscus sp Temperature of the water placed in the syringe as well as the potometer tube (�C) Distance moved by the air bubble (mm) Trials Average 1 2 3 5 15 25 35 45 1 1 "Transport and Water Relations." Skoool. 2007. Intel Corporation. <http://www.skoool.co.za/studynotes/science/id222.htm>. 2 "Transpiration." ATMOSPHERIC SCIENCES: University of Illinois at Urbana-Champaign. Department of Atmospheric Sciences (DAS) at University of Illinois at Urbana-Champaign. <http://ww2010.atmos.uiuc.edu/(gh)/guides/mtr/hyd/trsp.rxml>. ?? ?? ?? ?? Biology IBS October 13, 2008 Kyung Jin Kim Biology IBS October 09, 2008 Kyung Jin Kim Biology IBS October 09, 2008 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology 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 International Baccalaureate Biology essays

  1. Marked by a teacher

    Osmosis Internal Assessment (Biology)

    4 star(s)

    exposure to the outside environment and allow the potato strips to remain fresh. Which part of the potato was used As different parts of the potato may have different consistency and density, this could affect the potato strips' water concentration, and thus, its ability to take in water from its surroundings.

  2. Biology HL IA - Transpiration lab report

    it was 0.113 and then one third was cut it was 0.077, etc. Although tendency seems to be quite reliable, an anomaly occurs when all the leaves are cut. Even after 10 minutes of rest water was still being absorbed by a plant.

  1. internal assessment rate of transpiration

    � 0.01 Mass of entire apparatus, Newton (N) � 0.05 With light Without light Trial 1 Trial 2 Trial 1 Trial 2 0 0.90 0.85 0.75 0.90 15 0.90 0.85 0.70 0.85 30 0.90 0.84 0.70 0.85 45 0.90 0.84 0.70 0.82 Table 1; the mass of entire apparatus in SET A experiment for rate of transpiration of plant in different light intensity with respect to time.

  2. Testing the effect of characteristics of leaves on the transpiration rate of * ...

    This process is so-called transpiration. On the underside of leaves, there are a number of structures of stomata, which look similar to a pore and they have what is called guard cells. In fact, stomata is the passage for intake of carbon dioxide and way out of oxygen.

  1. The effect of toliet cleaning products on E-coli ...

    The diameter of the zone of inhibition shall be recorded if the substance has any effect on the growth of e coli. The diameter shall be measured using a 30cm/300mm + 0.1cm/1.0mm E coli strain Uncontrolled variable All of the e coli shall be sources for the same diameter, however

  2. Allelopathy. Open Investigation Will increasing the number of allelopathic sunflower plants effect the ...

    23 18 17/07/09 36 36 40 37 35 37 34 39 32 33 30 31 29 35 29 29 27 25 27 24 27 31 30 26 25 34 02/08/09 74 81 83 79 68 71 68 79 70 63 51 60 57 42 50 47 45 45 48 41

  1. Biological rhythms. In order to say that such a clock exists, it is essential ...

    Organisms, including plants and humans, continue their rhythms when placed in the deepest mine shafts or when orbited in satellites but all research thus far indicates that the oscillator for circadian rhythms is endogenous (internal) . This internal clock, however, is entrained (set)to a period of precisely 24 hours by

  2. bio lab - The Effect of Temperature (C) on the Rate of Diffusion in ...

    When the temperature was 100 C° (±0.001 °C), the boiling water was poured in a 200ml test tube to keep the surface area controlled. 5) An eye dropper was then used to extract the green food colouring. Same brand was used for all trials to keep the concentration of the food colouring the same.

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