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

Determine the energy content of different types of Seed: Compare the calorie content of different seeds.

Extracts from this document...

Introduction

Determine the energy content of different types of Seed: Compare the calorie content of different seeds. Within a seed there is a significant amount of stored energy, in the form of lipid and carbohydrate. The energy stored in a seed is measured in joules 1 Joule is 2.390 x 10� calories. When a seed is digested a person can be aware of how much energy they are consuming by having access to the seeds calorie content. Seeds also benefit the consumer in other ways; 100 grams of sunflower seeds also contains 24 g of protein and 7.1mg of iron�. Pumpkin seeds (based on 100 grams) contain 29 grams of protein, 11.2 mg of iron and 1144 mg of phosphorus�.A method of measuring calories can be found if the joule content is converted. To conclude, in order to determine the energy content of different seeds the joule content must be found. 1 joule is 2.390 x 10� calories of stored food 4.184 Joules is needed to raise 1cm� of water by 1�C (http://en.wikipedia.org/wiki/Joule) Hypothesis: H1: Change in energy content in different seeds will cause a different change in temperature of water (When the seed is used as an energy source) H0: Change in energy content in different seeds will have no effect on the temperature of water. (When the seed is used as an energy source) ...read more.

Middle

then the flame or energy release will not effect the temperature of the H�O as much as it will have longer to lose energy before it affects the H�O. The clamp and stand holds the test tube above the surface of the seeds which are placed on the wire gauze, on tripod. Then a Bunsen burner is used manually to burn the seeds until lit then put under the test tube and timed for 30 seconds. We controlled the time in which the seeds are able to heat the H�O as, if the seeds had a longer or shorter time period there would be a stronger or weaker effect on the temperature on the H�O. Equipment list: * 2g of pumpkin seeds x5 * 2g of sunflower seeds x5 * Bunsen burner * Thermometer x2 * Tray x2 * Test-tube x2 * 20ml of Water x10 * Clamp & stand x2 Results: A table showing the calculated data Type of mass Average �C change Calories per gram Pumpkin seed +5.2 0.0104 Sunflower seed +10.4 0.0208 Results of Mann-Whitney U test This table shows the components to the calculations of the statistical test shown in Appendix 3. N1 5 N2 5 U1 21 U2 4 Level of significance P = 0.05 Critical table value 2 The null hypothesis is accepted (P > 0.05) ...read more.

Conclusion

Even when comparing the protein and iron content of both seeds there is no significant difference. If the experiment was to be more effective, the seeds should be tested in the same form. All of the seeds should be crushed to a very similar consistency to therefore compare each seeds kinetic energy more accurately. Different seeds should be tested in order to see whether the experimental hypothesis can be accepted. Appendices Appendix 1 A table showing the Data collected from the experiment (Raw data) Type of seed Experiment1(�C) Experiment2(�C) Experiment3(�C) Experiment4(�C) Experimen5(�C) Pumpkin +2 +2 +9 +4 +9 Sunflower +5 +15 +8 +13 +11 Appendix 2 Example 1 Average= sum of �C change / number of experiments Example 2 Calories per gram = (Average �C change * 8.368)*(2.390 * 10�(-4)) ������������������������������������������������������������ 2 Appendix 3 Mann-Whitney U Test Step 1 Pumpkin seed 2 2 4 9 9 Sunflower seed 5 8 11 13 15 Change in temperature Rank (R1) 1.5 1.5 3 6.5 6.5 8 9 Pumpkin seed 2 2 4 9 9 Sunflower seed 5 8 11 13 15 Rank (R2) 4 5 10 Step 2 ?R1 = 36 ?R2 = 19 Step 3 Pumpkin seed U1 = n1 x n2 + 1/2 n2 (n2+1) - ?R2 = 5 x 5 + 1/2 5(5+1) - 19 = 25 + 15 - 19 U1 = 21 Sunflower seed U2 = n1 x n2 + 1/2 n1 (n1+1) - ?R1 U2 = 4 Dachinii Lee-Hewitt � http://vegsoc.org/info/nutsseeds.html � http://www.calorie-counter.net/nuts-calories/pine-nuts.htm ...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. To investigate the amount of protein present in different types of milk by measuring ...

    Table 3: showing the nutrition panel in different types of milk per 100ml and per 20ml Types of milk Mass of protein(g) per 100ml Mass of protein(g) per 20ml Full cream milk 3.4 0.68 Skimmed milk 3.4 0.68 Goat milk 2.9 0.58 Soya milk 1.2 0.24 Calculation: -Mass of protein

  2. effect of microwave radiation on lentil seeds lab report

    Sum of size () = 280.2 Mean () = / n = 280.2/ 15 = 18.68 Deviation from mean: (Deviation from mean) 2 (x-) 2: Sum of squares (2) = 1012.97 Standard deviation () = 8.22 Variance (S2) = () = 72.36 Stem height (� 0.05 cm) of lentil plants put under radiation for 20 seconds Lentil seeds did not exhibit any growth.

  1. In this extended essay I am looking at the effect of different kind of ...

    Most seeds go through a period of dormancy where there is no active growth; during this time the seed can be securely transported to a new position and/or survive adverse climate conditions until circumstances are favourable for growth. Dormant seeds are mature seeds that do not develop because they are

  2. Investigating the Effects of Salt on Seed Germination

    The data looks fairly reliable, as there are no anomalies, although the variation of the gradient may have been caused due to a few errors in the setup of some of the petri dishes. CONCLUSION In conclusion, the results gathered are sufficient and clearly show that the germination of seeds

  1. The Effect of Temperature on the Vitamin C Content of Lemon Juice

    My data has a reasonably small systematic error meaning that my results were mostly accurate. We managed to do five trials which meant that my results were quite reliable, and the relatively small error bars mean that my recorded values were close to the mean and therefore precise.

  2. How does the salinity of water affect the germination of mung been seeds as ...

    seeds has on the seeds ability to begin germination as shown by the mean number of seeds with a cracked testa four days after solution was added to the seeds Comment on the graph: The calculated standard deviation and error bars for two of my results (0.3 and 0.5)

  1. Effect of Incandescent, Fluorescent and LED lights at 900 lumens on the concentration of ...

    Volume (2ml) of indicator 2,6-Dichlorophenolindophenol (DCPIP) ________________ The volume of indicator DCPIP is being controlled by using a 5ml syringe to measure 2 ml of the indicator. ________________ The volume of indicator DCPIP must remain constant so it does not interfere with the range in the volume of ascorbic acid

  2. Environmental Mangement - Upland Burning in Ireland and the Effects of the Heritage Bill ...

    be the most practical way to reduce the risk of large wildfires. The appropriate interval between prescribed burns varies with several factors, including the past wildfire occurrence, fuel accumulation rates, the risk of a fire and the values at risk.

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