Investigating if the Concentration of CuSO4 Affect the Germination of Barley Seeds
Investigation
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Analysis
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When looking at the data collection sheet it can be seen that as the
concentration of CuSO4 increases, the percentage of seed germination
decreases. This already shows a clear sign that enzyme inhibition has
occurred.
Looking at the “Average Length of Roots” graph, it can be seen that
the concentration of CuSO4 does inhibit the growth of roots
significantly because the average root length drops sharply after the
0% solution. However some of my results nay have been anomalous
because the decline is far too steep to draw any reliable conclusions.
When comparing this graph to the “Average Length of Shoot” graph, it
can be seen that the average shoot length for each concentration
depreciates at a steadier rate; perhaps then, heavy metal ions affect
enzymes that are responsible for root growth more than they affect
those that are responsible for shoot growth. This is could be a topic
for further investigation.
For both graphs however, its shows that the depreciation rate between
each concentration decreases. For example, using the “Average Length
of Roots” graph it can be seen that the gradient between each
concentration becomes steadier and steadier as the concentration
increases. This shows that inhibition of growth is affected most
directly after the 0% concentration.
When looking at the average mass of roots, we can see that it falls
from 0.98g to 0g from 10% copper sulphate solution to 0%
concentration. There is a substantial drop between 0% Copper Sulphate
and 10% showing that on average the best rate of growth for a seed is
without the presence of Copper Sulphate.
Conclusion
In my hypothesis, I stated that as the concentration of copper
sulphate solution increased, the level of seed germination would
decrease. I feel that my results clearly show this and prove my
hypothesis correct. The reason for this is because the enzymes used
for germination (amylase, maltase, lipases, proteases etc) are
· Wear the lab coat all the time in case the acid spills on you.
...o grow for the next nine months? It is unlikely that society would consent to people seeds growing in their homes.
To make the test fair I will use the same amount of water and the leaf
In my hypothesis I previously believed that the lower the lower the pH level the more seeds would germinate, due to the extra hydroxide. But more seeds actually germinated in the pHs closer to neutral. Some problems in the experiment was the towel drying out and the seeds no longer absorbing the pH, rewetting the towels with the solution could prevent this. Some experimenter errors that occurred is the seeds falling out of the towel which resulted in seeds germinating or not germinating. Also, air getting into the bags and drying out the towel faster could have been prevented by making sure the bag was closed. Lastly, the seeds did not get put in the bag exactly like the previous time which could have affected the germination. To improve this lab, measuring out the same amount of solution for each pH could have made it more accurate. To further this experiment we could have had another set of seeds in the same pH solutions but in the sun to see
For years farmers have been adding natural fertilizers to their crops. It is a big risk though. Over fertilizing is very dangerous. It puts high concentrations of salt into the soil. It can also affect the water resources nearby. Nitrogen, Phosphate, and Potassium are the basics of fertilizer. If a certain nutrient is short in supply the fertilizer might not work as well. Calcium, iron, manganese are also nutrients that might be needed. So don’t just trust the fertilizer bag that says it has all the nutrients, test it out. (Miller and Levine 717)
The question that was proposed for investigation was: Can the theoretical, actual, and percent yields be determined accurately (Lab Guide pg. 83)?
We used wheatgrass were 40 wheatgrass seeds, two empty pots, soil, and water. We first added soil for both pots and 20 wheatgrass seeds in each pot. My partner and I decided that we label pot one experiment which is “sugar and water” and pot two control which is “water” only. The experiment was for almost four weeks we had to make sure both get the same room temperature and water, so we can see the results after this amount of time. Both pots had same room temperature so both can have the same amount of sunlight also, the same amount of water which is a glass of water from the sink once a week. In the experiment pot we added a glass of water with one teaspoon of sugar and the control pot glass of water. Every week we used to see both pots grow almost the same. At the end of the experiment, my partner and I measured the length for both plants and we recorded the average for each plant, so we can know the rate of growth
The aim of this investigation was to determine how five different metals of differing reactivity reacting with Copper Sulfate solution would affect the enthalpy change of the reaction.
The seed volume from average radius was found using the equation VOL = (4/3)*3.1416* ((L/2+W/2+D/2)/3)3. Surface area was calculated using an approximate formula, SA~ 4pi [(a^p b^p + a^p c^p + b^p c^p )/3]^{1\p}, where p=1.6075, and a, b, c are the three radii (a>=b>=c), made by Knud Thomsen. Hilium area was found by dividing the hilium width and the hilium height by two then multiplying by each other and 3.1416. By dividing the hilium width by the surface area, we found the hilium area to surface area ratio. Hilium width to seed width ration was calculated by dividing the hilium width by the seed width. Arm length was divided by hilium width to get the arm length to hilium width ratio, and finally stigma/style length to seed length ratio was calculated by dividing style length by seed length.
The Electrolysis of Copper Sulphate Aim Analyse and evaluate the quantity of Copper (Cu) metal deposited during the electrolysis of Copper Sulphate solution (CuSo4) using Copper electrodes, when certain variables were changed. Results Voltage across Concentration of solution electrode 0.5M 1.0M 2.0M 2 5.0 10.6 19.5 4 10.5 19.8 40.3 6 14.3 26.0 60.2 8 15.2 40.4 80.3 10 15.0 40.2 99.6 12 15.1 40.0 117.0 Analysing/Conclusion The input variables in this experiment are; concentration of the solution and the voltage across the electrodes. The outcome is the amount of copper gained (measured in grams) at the electrodes. By analyzing the graph, we can see the rapid increase of weight gained for the 2.0 molar concentration as the gradient is steeper.
There is a simple example in farming. A garden of length 20 feet and breadth 20 feet plot gives a variety of pounds of tomatoes if the gardener simply puts within the counseled variety of rows and plants per row, waters them properly and keeps the weeds pulled. If the gardener varies this by adding a pound of fertilizer to the surface soil, however otherwise will everything constant, he will increase the quantity of pounds of tomatoes the g...
...ptions in trying to figure the exact amount. Even though these problems cause confusion in the scientific studies, farmers still found other options to apply the acceptable amount of nitrogen needed for that crop to grow.
To investigate the temperature change in a displacement reaction between Copper Sulphate Solution and Zinc Powder
Cereals, millets and legumes are generally pre-processed by fermentation, germination (malting), cooking, milling and roasting to enhance their functional and nutritional values. Germination/sprouting/malting is a biochemical process which involves transition of a seed from dormant state to vital active state. The prime objective of this traditional process is to promote the development of hydrolytic enzymes that are not active in raw seeds (Dewar et al., 1997). Malting is a complex process that involves many enzymes; important ones are -amylase, -amylase, -glucosidase, and limit dextrinase that improves the nutritive value of foods through controlled germination followed by controlled drying of the kernels. Since germination is cheap and more effective in improving nutritional value it was incorporated in mixes to contribute to the nutrition of people (Rusydi et al., 2011).
of Copper Sulphate. To do this I plan to work out the amount of water