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

internal assessment snail

Extracts from this document...


ZUBAIR ABDUR RAHIM BIN AHMAD M08L TITLE To investigate the rate of respiration in small terrestrial animals RESEARCH QUESTION What is the different between the rate of respiration of snail and the rate of respiration of cricket? INTRODUCTION During respiration, oxygen is used while energy and carbon dioxide are produced. For each molecule of oxygen used, one molecule of carbon dioxide is released. If respiration occur in a closed system and dense with water, there should be no change in gas volume. However a decrease in the gas volume can occur if sodium hydroxide or potassium hydroxide is used to absorb carbon dioxide. The decrease in volume caused by absorption of carbon dioxide should equal the amount of oxygen used in respiration. HYPOTHESIS The rate of respiration of cricket will be higher compared to the rate of respiration of snail. This is because cricket is much active compared to snail in nature. Active animal will used more energy to support their activities. ...read more.


DATA COLLECTION 1) Qualitative data a. The snails move very slowly and they are very inactive. b. The crickets move actively and jump energetically. c. The colour of the potassium hydroxide remains colourless at the end of the experiment. d. The crickets are more passive at the end of the experiment. 2) Quantitative data O2 used, ml � 1.0 Weight g � 0.001 g Time, min � SNAILS No, reading, 3.00 2.00 20.25 19.28 27.83 15 15 15 Average 2.5 23.56 15 CRICKETS 2.0 2.0 3.0 3.47 3.46 4.35 15 15 15 Average 2.3 3.76 15 Data Processing Average = 02 used(ml)� 1.0ml Weight(g) � 0.01g Time(minutes) Rate of respiration (ml g-1 min-1) Snails : 1st No reading 20.25 15 - 2nd 3.0 19.28 15 0.010 3rd 2.0 27.83 15 0.005 Average 2.5 23.56 15 0.008 Crickets : 1st 2.0 3.47 15 0.038 2nd 2.0 3.46 15 0.039 3rd 3.0 4.35 15 0.046 Average 2.3 3.76 15 0.041 Table 3: Amount of oxygen used and the weight of the animals DISCUSSIONS 1. ...read more.


2. Firstly both animals are trapped in the boiling tube. Consequently the animals don't feel it like their environment and this may affect the rate of respiration. Therefore, a bigger container should be used to keep the animals. A bigger container may help to settle down better. Hence, respiration rate will be more accurate. 3. Secondly, the experiments are only done twice. Consequently, the result will be inaccurate. Therefore, in order to get better result, the experiments should be done more than that. 4. Thirdly, snails usually live in humid place. However, in the boiling tube, the humidity is different. Hence this will affect the rate of respiration because snails exchange the gaseous through the skin. Therefore, water should be dropped on the skin before starting the experiment. 5. Lastly, the usage of the manometer is not accurate to measure the change of the volume of carbon dioxide. Therefore, manometer should be replaced with respirometer which can give a better result. CONCLUSION The rate of respiration for cricket is higher compared to the rate of respiration for snail since cricket is more active compare to the snail. ...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

    Osmosis Internal Assessment (Biology)

    4 star(s)

    12. Place a fresh paper towel on the electronic weighing scale, set the scale to zero, then weigh each potato strip on the fresh paper towel, record their respective weights. 13. Repeat steps 11 to 12 for the potato strips labelled "immersion duration of 2 hours", followed by those labelled 3 hours, 4 hours, and lastly, 5 hours.

  2. internal assessment vitaminC

    32.95 0.0379 � 0.3 % Boiled lime juice ( 1 hour) 34.50 0.0362 � 0.3 % Table 2: average volume of juice used and its respective concentration of ascorbic acid Bar Chart 1 : Concentration of ascorbic acid in pure juice Limitation Suggestion There is uncertainty in determining the colour

  1. internal assessment rate of transpiration

    When the plant is under water stress, the need to preserve its water source is higher than its need of carbon dioxide for photosynthesis. Under these conditions, the plant will secretes abscisic acid, (ABA). This chemical is a messenger which causes stomata to close.

  2. Should Animals have the same rights as Humans? Both animals and humans exhibit behaviours ...

    characteristic of an alimentary reflex; there was no slightest trace of any motor defence reflex. 4:45 pm 4 usual place 5 5:07 pm 2 New place 7 5:17 pm 0 New place 9 5:45 pm 0 New place 6 After each stimulation the dog was allowed to eat food for a few seconds.

  1. Bilharzia. Schistosomiasis, commonly known as snail fever, bilharzia and bilharziasis, is a disease ...

    larvae burrow into the skin in only a few seconds and migrate in the body system from the skin capillaries to the lungs, heart and then finally the liver in 7 days or so. By the time the parasites reach the liver, they mature and form into pairs of adult

  2. Extended Essay- How is production of carbon dioxide (CO2) during digestion affected by the ...

    As stated before, carbohydrate compounds consist of simple and complex forms. Simple carbohydrates are composed of monosaccharide or disaccharide units. Glucose, fructose, and galactose are monosaccharides, or simple sugars. Glucose is the most common type of sugar and it's the primary form of sugar that is stored in the body

  1. Biology Internal Assessment Peas Lab

    One table had the temperature values of two different types of peas during morning hours and the second table had the temperature values of the two different type of peas during evening hours. This way it is easier to observe the rise and fall of the temperature values of the

  2. Biology Internal Assessment - investigate whether the Window and Notching caterpillar share the same ...

    Shape of Feeding site The mean distance from the midrib of the cabbage tree leaf to the nearest point of the feeding site (mm) Standard Deviation of the 50 samples of the distance from the midrib of the cabbage tree leaf to the nearest point of the feeding site Notch

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