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

Hair Lab Report - investigate the force needed to break down a hair and to investigate if characteristics found in different hairs make a change in the strength these have.

Extracts from this document...

Introduction

Hair Lab Report Aim: To investigate the force needed to break down a hair and to investigate if characteristics found in different hairs make a change in the strength these have. Hypothesis: There will be hairs which would be more resistant; therefore they will resist more weight. I think that hairs which weren't chemically treated will be stronger than the ones which were. Also I think the type of colour will be reflected on the strength of these hairs. Materials: * 12 hairs, 3 per person * Ruler * Weights (100g) * Clamp stand * Force meter Diagram: Method: 1. Cut three hairs from four different girls 2. Measure each, take note of these measurements. ...read more.

Middle

treated 60 150 Sabrina hair n� 1 Brunette- straight No treated 76 140 Sabrina hair n� 2 Brunette- straight No treated 75 190 Sabrina hair n� 3 Brunette- straight No treated 76 200 Victoria hair n� 1 Brunette- wavy Chemically treated 50 100 Victoria hair n� 2 Brunette- wavy Chemically treated 50 150 Victoria hair n� 3 Brunette- wavy Chemically treated 50 100 Conclusion: Our aim was to investigate the force needed to break down a hair and to investigate if characteristics found in different hairs make a change in the strength these have. We carry the steps mentioned in the method to accomplish the aim. In this experiment, the dependant variable is the strength of the hair, and the independent variable was the different hairs. ...read more.

Conclusion

One of these reasons can be that the cysteine bonds are too weak; therefore they couldn't resist much weight. Another reason, it's the lack of keratin. Keratin is an example of a fibrous protein. Keratin is linked with cysteine by covalent bonds to form disulphide bonds. The more disulphide bonds produced, the stronger the fibrous protein is. By looking back to my hypothesis, I realize that I what I thought before doing the experiment wasn't very different to the results presented. However, the experiment proved with results for example, that certain colors represent more strength than other colors. The experiment was done correctly, however I believe there could have been improvements to reduce errors in results. For example, dividing chemically treated hairs from non treated hairs and also diving hairs in terms of colors. This would have allowed to obtain more precise results. ...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

    Biology: Lab report Germination

    4 star(s)

    This can be collected from the graph because of the proximity of the red an green line, the lines sometimes overlap. Discussion Conclusion Light Experiment I will conclude each experiment separately as they were, in fact, separate experiments. Upon testing the variable of light, it has become apparent that seeds germinate more quickly in the light.

  2. Biology HL IA - Transpiration lab report

    but covered with an oily material, for instance, nail polish. This would work as stomata are usually located on the lower and sometimes upper epidermis of leaves surface and nail polish would cover them. Second, as the area of leaves reduced every time depended on leaves' shape, it was difficult

  1. Breaking Force of Hair Lab

    Therefore, the probability that the difference between the two groups is due to chance is 0.05 (5%). Range Non-Blow Dried Hair Force Blow Dried Hair Force Range = Largest value - Smallest Value = 3.47 - 0.85 = 2.62 Range = Largest value - Smallest Value = 3.88 - 0.03

  2. Bio lab - Oxygen Consumption in germinating and non-germinating seeds

    This means that the amount of oxygen consumption could have either increase or decreased. Secondly, the three vials used in the experiment were not fully submerged during equilibration. The purpose of the equilibration or stabilizing was to equilibrate the pressure inside and outside of the vial.

  1. effect of microwave radiation on lentil seeds lab report

    Stem height (� 0.05 cm) of lentil plants put under radiation for 40 seconds Lentil seeds did not exhibit any growth. Stem height (� 0.05 cm) of lentil plants put under radiation for 60 seconds Lentil seeds did not exhibit any growth.

  2. Biology Industrial Melanism of Peppered Moth Lab

    Calculations of the percentages of light-coloured moths and melanic moths left on light-coloured "tree bark". Trial Number Percentage of Melanic Moths (%) Percentage of Light-Coloured Moths (%) 1 40.0 60.0 2 30.0 70.0 3 13.3 86.7 4 3.3 96.7 5 10.0 90.0 Processed Table 6.

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

    Plants exposed to a set frequency of sound have a tendency to germinate more rapidly, grow taller and weigh more than those kept in silence. Plants also like good, vigilant care. If you are playing the music you like for a plant, it may lead you to take better care of it.

  2. Drosophila Lab: Eye Color

    Qualitatively, I will draw a diagram of each offspring in order to display the phenotypes of each cross, either wild type red-eyed or white-eyed. Qualitatively, I will count the number of flies in each cross as a total in addition to the total of each phenotype from that cross.

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