Water transpiration is plants is when water is absorbed through roots and carried up the stem to the leaves through a force called capillary action.
An experiment was done to measure the rate of transpiration in four different types of plats:
1) zebra plant
2) weeping fig
3) english ivy
4) dieffenbachia
Each plant sample (with the same mass) was placed in a test tube.
They were exposed to four different types of environment for one hour:
1) normal
2) heater
3) fan
4) lamp
The volume of water they produced was measured with the unit ml.
Independent Variable:
This variable is the variable that is changed on purpose in order to get results from an experiment. In this experiment the use of a heater, fan and lamp (which changed the environment) and the four different types of plants experimented on are independent variables.
Dependent Variable:
This variable is variable that is affected by the independent variable. In this experiment the dependent variable is the volume of water transpired from each of the four plants.
Control Variable:
The variables that I controlled are the mass of each plant sample used in each experiment, the temperature of the air as a result of the heater, the force the fan produced, the brightness of the lamp and the temperature in the normal environment.
Validity:
The test has a very good validity because there is only one independent variable affecting the results.
Reliability:
This experiment is carried out in simple steps, and so many other people can repeat this test using their own equipment or even their own method, attaining the same results. This makes this experiment reliable.
Precision:
The results are precise in this experiment as the smallest unit of measurement for measuring liquids is used (ml).
The plant with the highest rate of transpiration overall was the dieffenbachia. This is because this plant has large leaves giving it a large surface area. This increases the rate of water evaporating from its stomata.
The fan was the most effective factor and caused the plant to produce the most water. This is because water vapour respired from the stomata of the leaf was sped up as wind power drove more water particals away from the plant. Heat was the second most effective because the heat energy caused water vapour particals to condensate and become water. This increased the volume of water transpired from the plants. The least effective factor was the lamp. This is because the light energy increased the rate of photosynthesis within the plants, which used up water for the process.
An experiment was done to measure the rate of transpiration in four different types of plats:
1) zebra plant
2) weeping fig
3) english ivy
4) dieffenbachia
Each plant sample (with the same mass) was placed in a test tube.
They were exposed to four different types of environment for one hour:
1) normal
2) heater
3) fan
4) lamp
The volume of water they produced was measured with the unit ml.
Independent Variable:
This variable is the variable that is changed on purpose in order to get results from an experiment. In this experiment the use of a heater, fan and lamp (which changed the environment) and the four different types of plants experimented on are independent variables.
Dependent Variable:
This variable is variable that is affected by the independent variable. In this experiment the dependent variable is the volume of water transpired from each of the four plants.
Control Variable:
The variables that I controlled are the mass of each plant sample used in each experiment, the temperature of the air as a result of the heater, the force the fan produced, the brightness of the lamp and the temperature in the normal environment.
Validity:
The test has a very good validity because there is only one independent variable affecting the results.
Reliability:
This experiment is carried out in simple steps, and so many other people can repeat this test using their own equipment or even their own method, attaining the same results. This makes this experiment reliable.
Precision:
The results are precise in this experiment as the smallest unit of measurement for measuring liquids is used (ml).
The plant with the highest rate of transpiration overall was the dieffenbachia. This is because this plant has large leaves giving it a large surface area. This increases the rate of water evaporating from its stomata.
The fan was the most effective factor and caused the plant to produce the most water. This is because water vapour respired from the stomata of the leaf was sped up as wind power drove more water particals away from the plant. Heat was the second most effective because the heat energy caused water vapour particals to condensate and become water. This increased the volume of water transpired from the plants. The least effective factor was the lamp. This is because the light energy increased the rate of photosynthesis within the plants, which used up water for the process.