Biology T-Test Lab
Ms Robson
2012-03-01
DESIGN LAB
Research Question: How does the amount of water present 5m from the ocean and 20m away from the ocean affect the circumference of the coconut trees ten metres from the ground?
Aim: To find out how the amount of water available 5m from the ocean and 20m away from the ocean affects the circumference of coconut trees ten metres from the ground.
Hypothesis:
➢ The coconut trees found 5m from the ocean receives more amount of water than those found 20m away from the ocean. Therefore I expect that the circumference of coconut trees found 5m from the ocean will have a greater circumference than those 20m away from the ocean. One reason is, water is a very essential element of plants (coconut trees) therefore availability of water will enhance the growth of the coconut trees in height and circumference. It is also a possibility that the soil 5m from the ocean has more nutrients and minerals because it is moist hence support these other elements but the soil 20m from the ocean will probably be a little dry since they do not receive enough water hence will contain few nutrients and minerals. Nutrients and minerals support the growth of plants (coconut trees) therefore the circumference of coconut trees 5m from the ocean will be greater than those 20m from the ocean.
Variables:
➢ Independent Variables – amount of water ( we estimated that the amount of water 5m from the ocean will be greater than that 20m away from the ocean ).
➢ Dependent Variables – circumference of the coconut trees measured 10m from the ground. (cm )
➢ Controlled Variables
• Same species of trees: We only measured the circumference of coconut trees. Other trees have different sizes of their circumference because of their type of species or other factors. This could interfere in our data collection thus the species measured was only of the coconut trees
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