Apple Mass Experiment. Biology

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By Alexandra Malanicheva Year 12 Apple Mass Experiment Aim: To find out whether the height of the trees influence its apples mass. Prediction: The higher the taken tree — the greater the fruit mass. Hypothesis: A tall tree is supposed to receive more water from soil by having longer roots, to have a bigger amount of leaves for photosynthesis than a short tree, therefore, to receive more supplies for working out energy and having bigger apple mass. Design: 1) a. independent variable — the height of the taken tree; b. dependent variable — apple mass; c. controlled variables: all the trees in this experiment are situated on a sunny side all the trees in this experiment are of the same species all the apples are taken from the lowest branches of the chosen trees light intensity moister content of soil precipitation received the season the apples are picked 2) The method: a. Value of the independent variable: The independent variable can be categorized by the height (and the species of the tree). The collected apples mass was measured by weighting the each sample with scales. In order to determine a difference in tree height, trigonometry was used. The angle to the top of the tree was measured using a clinometer and its remoteness from the tree was measured from the base of that tree. b. Values of the controlled variables: All the apple were taken from the lowest branches of the chosen trees as it was mention before The trees were chosen that way so they are situated not far from each other and both get an equal. amount of the sunlight The same apple tree species is controlled by

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