This is because plants obtain most of their water from the soil and when salt is in the soil it becomes harder for the plant to retrieve water (Hudson, 2012).
This therefore means the plant will have to use more energy to retrieve water and this makes the plant dehydrated. When this happens the plant growth will be slow and stunted and its fruit will be really small. Investigation variables Table 1: Practical Investigation Variables Variables Identified| Type of variable| | | Water| Controlled| Concentration of salt| Independent | Sunlight| Uncontrolled | Soil| Controlled | Type of plant| Controlled|
Time| Controlled| | | | | | | 1. 2 Controlling Variables Treatment of controlled variables TABLE 2: Control Treatment of Variables Variables| Control treatment| Soil type | The same type and amount of soil for all the different trials| Type of plant| Green beans will be used for all the trials| Water| Each of the plants will each get 750ml of water for all the trials| Time| Each trial of the plants will have 10 days for recording data| Control Experiment In the experiment the environment of the plants and where it was placed were all controlled to minimalize any uncontrolled variables.
This was done so that it would not affect the dependant and independent variables. 1. 3 Experimental Method Apparatus Required| Quantity| Green beans| 4 packets | Soil | 2 bags of 20L| Small pot plants| 6 pots| Ruler(30cm)| 1 | Measuring jar (1 litre)| 1 | Mass balance| 1| sodium chloride | 1 Pack| Materials TABLE 3: Practical Safety and Risk Assessment See Appendix 1 Method 1. Place soil in plant pots and put pots in direct view of the sun 2. Plant 3 seeds of green beans into the pot 3. Give the plant 750ml of water every day for 10 days 4. Record the shoot development of the plant with a ruler for 10 days (cm) 5.
The Essay on Solar Energy Longest Are Rock Soil Water And Stone
Solar Energy This experiment deals with the testing of solar energy and what material holds the greatest amount of heat. Solar energy is heat that the sun gives off. The materials used to determine what holds the heat the longest are rock, soil, water, and stone. The purpose of this project is to see what of the four materials hold the heat the longest. My hypothesis is that soil holds the heat or ...
Explanation In this experiment it was found that sodium chloride decreases the plant growth of green beans. At 0. 5% of sodium chloride concentration solution the results show that it didn’t affect the growth the plant in substantial way (Table 5).
However with 2% of sodium chloride concentration solution the growth of the plant had decreased by 60 mm (Table6) than the plant that was not give any concentration of sodium chloride (Table 4).
The 5%, 10% and 15% concentrations of sodium chloride also decreased the plant growth to the point where it could only shoot up to 3mm at max.
All these results were put in Graph 1 to put in comparison the different concentrations of sodium chloride. The graph clearly shows that the higher the concentration of salt the more the growth of the green beans is stunned. 3. 2 Evaluating Procedures Reliability In this experiment the reliability of the data is thought to be accurate. In the processing of the data all off the calculations for averaging were double checked. In the calculations there was also room for uncertainties and it was accounted for. In the experiment there were no uncertainties that had significant effect of the processing of the data.
Limitations / Weaknesses / errors in laboratory investigations Some of the limitations that was presented in this experiments were the conditions that the plants were in. The plant was not monitored 24/7 and therefore it means that plant may have been subject to unknown uncertainties and this could be one of the limitations/weaknesses. Another limitation that may have happened is the calculations of averages for the graphs. These calculations were done by hand and this therefore means that is subject to error. Significance of weaknesses on experimental results
The Essay on Sodium Chloride Oxygen Beaker Enzyme
DESCRIPTIVE TITLE The Effect of Different Amounts of Sodium Chloride on the displacement of oxygen. INTRODUCTION The dependability of the rate of an enzyme-mediated reaction is based on two factors: the substrate concentration and the concentration and action of the enzyme that catalyzes the reaction (Vander, et. al. , 2001). Enzymes are catalysts that produce chemical reactions in cells. Enzymes ...
The weaknesses of the experiment doesn’t affect the result of experiment in a significant way. This is because the weaknesses of the experiment are very minor and doesn’t contribute to the total data acquired. 3. 3 Improving the Investigations Modifications to Experiment If the experiment were to be carried out again it would be put under 24/7 watch. If this is done then unknown uncertainties can be prevented or recorded to see how it affects the data. It would also be put somewhere where the conditions were the same for all the trials so that there would not be any uncontrolled variables.
