Unit 1 Biology Practical Report

Superior Essays
Stage 1 Biology Practical Report
Isabelle Bury C2
Surface Area : Volume ratio
Introduction:
A cell is described as the basic unit of all living things and is commonly known as a building block for these living organisms. Cells are considered the fundamental unit of life as it relates to the metabolic processes occurring which allow organisms to stay alive. Cells are responsible for providing structure within organisms, absorbing nutrients from food sources and converting nutrients into energy. Cells also contain various organelles which are also responsible for carrying out specialised functions within the cell. For example, ribosomes are an organelle found in plant cells and are responsible for creating protein synthesis, which is where ribonucleic
…show more content…
Diffusion occurs when these particular particles are able to freely move. There are many factors that can affect diffusion, such as the particle size, concentration difference, temperature and diffusion distance. Furthermore, the surface area-to-volume ratio will effect the rate of diffusion, as when the surface area-to-volume ratio decreases, consequently diffusion will be less efficient. Likewise, the larger the object the smaller the surface area, resulting in less diffusion.
Aim: To determine the effect of surface area to volume ratios on the movement of water through potato cubes.
Hypothesis: If the size of the potato cube is larger then the surface area to volume ratio will be smaller.
Accept of Reject Hypothesis: For the results to accept the hypothesis the larger potato cube (2X2X2cm in dimension) will need to decrease in mass. This will mean that the smaller potato cube (1X1X1cm in dimension) will need to increase in size. Whereas, for the results to reject the hypothesis the large potato cube will need to increase in mass. This will also mean that the smaller potato cube will need to decrease in
…show more content…
All of the materials were collected and placed on the bench.
2. Two potato cubes were cute, one had dimensions of 1X1X1cm, the second had dimensions of 2X2X2cm.
3. 50mL of salt solution was placed into a beaker.
4. The potato cubes were weighed and the mass of each was recorded.
5. The potato cubes were placed into the beaker simultaneously and the stopwatch started.
6. After 20 minutes the potato cubes were removed from the solution.
7. The potato cubes were weighed again and the mass was recorded.
Safety Procedures:
Knife – knifes can be very sharp, so to ensure that when using it nothing goes wrong, they should be held by the handle, the blade should be pointing at the ground when moving to bench and fingers should always be curled under when cutting.
Tweezers – Tweezers can sometimes be quite sharp, so appropriate use and concentration should be applied when in use.
Salt solution – The salt solution could be harmful if used inappropriately, so ensure that it always keeps away from the eyes.

Results:
Results Table:
Group Results:
Dimension Of The Cube Mass At Time = 0 (g) Mass After 20 Minutes (g) Change In Mass (g) % Change In Mass
1X1X1 cm 1.3g 1.13g -0.17g

Related Documents

  • Improved Essays

    The answer is that by changing the surface of the penny, the penny holds less drops of water because the soap is filling up the cracks, and the surface. 2. Write your hypothesis from part B. If we change the surface of the penny by putting soap on the penny then, the penny will hold less drops of water, and we will get different results then the original. 3. List at least 3 pieces of data from your experiment(and your textbook/notes) that shows support for or refutes your hypothesis.…

    • 933 Words
    • 4 Pages
    Improved Essays
  • Decent Essays

    3) Golgi Apparatus: - Synthesises and modifies proteins, lipids and carbohydrates. It also makes ‘Lysosomes’. - Its size is 2.5 µm in length. 4) Ribosomes: - The site of protein synthesis (or production of protein) -…

    • 152 Words
    • 1 Pages
    Decent Essays
  • Improved Essays

    Alka Seltzer Essay

    • 1275 Words
    • 6 Pages

    The pills will be split in half and quarters and ground into pebbles and powder. This variable will be changed 5 times during the experiment. DEPENDENT: The instrument of measurement will be water displacement, a reliable method that accurately shows the amount of gas produced.…

    • 1275 Words
    • 6 Pages
    Improved Essays
  • Improved Essays

    Paper Towel Lab

    • 723 Words
    • 3 Pages

    The question is, “Which paper towel brand is the most absorbent?” The hypothesis is, “If a dropper drops water equally on a paper towel of each brand until it started to drip, then Bounty brand would contain the most water, in grams. The independent variable is the brands of paper towels. The dependent variable is the grams of water that was contained in the paper towel. The control variable was that every paper towel sheet was cut to be 15.2 centimeters by 28.1 centimeters.…

    • 723 Words
    • 3 Pages
    Improved Essays
  • Superior Essays

    Chemical Reactions Lab

    • 1942 Words
    • 8 Pages

    The hypothesis was correct when it states that in each of the experiments the substance would change somehow. In experiment 1 showing formation reaction the substance did change by gaining mass and the mass was increases by 3.289 g. Then in experiment 2 showing decomposition reaction the substance not only change by losing mass by 1.673 g. but it also changes color from green to black. For experiment 3 showing single-replacement reaction but the temperature and pressure increase with the reaction. Finally, in the double-displacement reaction the substance changed color from clear to green and a precipitate…

    • 1942 Words
    • 8 Pages
    Superior Essays
  • Improved Essays

    Potato Lab Report

    • 1302 Words
    • 6 Pages

    Next, the mass was calculated for each cubes to the nearest 0.01g. The mass was recorded on a table that also showed the sucrose molarity. Next, the potato cubes were placed into different sucrose concentrations, 0.0M, 0.2M, 0.4M, 0.6M, 0.8M, and 1.0M. The potato cubes were then submerged in the various sucrose concentration solutions for 45 minutes. After the time is up, the potato cubes were removed from their concentration.…

    • 1302 Words
    • 6 Pages
    Improved Essays
  • Improved Essays

    Organelles In Cell

    • 664 Words
    • 3 Pages

    Similarly, peroxisomes degrades toxic compounds. Another small organelle is Ribosomes. RNA is used to synthesize proteins and can be found in the large number of Ribosomes. Endoplasmic Reticulum is involved in the transport of many materials. ER is made of two different types, smooth and rough.…

    • 664 Words
    • 3 Pages
    Improved Essays
  • Improved Essays

    Medium 10.36 cm2 1.20 cm3 8.63 16 mins Large 5.49 cm2 0.55 cm3 10.00 Discussion: The model of the agar blocks proved that the larger the surface area to volume ratio is…

    • 1472 Words
    • 6 Pages
    Improved Essays
  • Improved Essays

    These go about as a boundary to keep DNA inside the core where interpretation happens. The RNA produced amid interpretation is transported out through atomic pores. Numerous proteins are integrated at the Endoplasmic reticulum. The ribosomes tie to the ER (a film bound organelle) and make an interpretation of the RNA message into protein that either navigates the layer (like a protein channel does) or is inside the ER in a vesicle (for solvent proteins that are emitted by the cell by exocytosis... like development elements and hormone proteins) (Meiner,…

    • 1691 Words
    • 7 Pages
    Improved Essays
  • Improved Essays

    Osmosis Experiment

    • 813 Words
    • 4 Pages

    The independent variable in this experiment was time which was 10 minute intervals. The dependent variable was the weight of the raisin before and after each interval. And the control was the water temperature each raisin was placed in, which was Hot, room temperature, and cold. Hypothesis:…

    • 813 Words
    • 4 Pages
    Improved Essays
  • Great Essays

    Sugar Dissolving Lab

    • 1835 Words
    • 8 Pages

    PURPOSE/QUESTION The question that we will answer using this laboratory report is, “How is the rate of dissolving sugar affected by changing the temperature of the water, changing the rate of stirring, and changing the size of the crystal?” The independent variable of each laboratory experiment is different, however they are all being changed to get consistent and effective results for one dependent variable. The three independent variables are the temperature of water, rate of stirring and size of the crystal and the dependent variable of the all the experiments is the rate of sugar dissolving. HYPOTHESES Below are the laboratory experiment hypotheses that we have formed as a group to figure out what will happen to the rate of dissolving under…

    • 1835 Words
    • 8 Pages
    Great Essays
  • Decent Essays

    Potato Osmosis Lab

    • 959 Words
    • 4 Pages

    Equating to 0.60 seconds this is divide by the number of trials which is 5. Which equated to 0.12 seconds Conclusion Aim: Findings: e.g graphable trend Wether it supports the theory General paragraph, accuracy, reliable and valid Evaluation Systematic errors Description Analysis Improvement The increments do not go up in it’s orderly fashion Description, effect, impact To change the increment into 5% difference so that the mass changes of the potato would be more systematic, 0%, 15%, 20%, 25%, 30%.…

    • 959 Words
    • 4 Pages
    Decent Essays
  • Improved Essays

    Essay On Duckling

    • 518 Words
    • 3 Pages

    Testable Questions We have three testable questions. How does the amount of food consumed affect the mass growth of a duckling over the course of a month? How does the type of food given affect the mass growth of a duckling over the course of a month? How does the mass of a duckling relate to its floating volume displacement over the course of one month?…

    • 518 Words
    • 3 Pages
    Improved Essays
  • Improved Essays

    Osmosis

    • 612 Words
    • 3 Pages

    This further affects the conclusion drawn from the lab. One possible source of error created during this lab is the initial mass of the potato slices. Although the initial mass of the potatoes were precisely cut and measured possible errors can be taken into consideration. The slight variation…

    • 612 Words
    • 3 Pages
    Improved Essays
  • Improved Essays

    Agar Cube Diffusion

    • 1210 Words
    • 5 Pages

    In order to keep track of all the collected data, the following table will be utilized. Please note that even though the materials and procedure written above are based on one trial for each of the four cubes, I personally did 5 trials for each cube size in order to obtain a wide variety of results and enrich my experiment. Therefore, I used 20 agar cubes, which is otherwise not necessary to carry out the…

    • 1210 Words
    • 5 Pages
    Improved Essays