why did the researchers add filtrate which macerated moss had been removed to control microcosms?(worth 5marks)
1 answer:
The researchers in question opted to remove the macerated moss from the control group in order to <u>guarantee that the </u><u>results </u><u>were accurate. </u>
The experiment in question consists of:
- Placing volcanic rock samples into two glass containers
- Adding to one container the mixture of macerated moss and water
- The other container is the control, it receives only water
- The goal is to measure the release of minerals from the rocks.
When performing an experiment, the control group is of vital importance. The presence of a control group ensures the <em>accuracy</em> of an experiment.
Given that moss is grown on rocks and will erode the rock over time, the researchers opted to remove it from the control sample. <u>Minerals present in the rock might mistakenly be measured as </u><u>minerals </u><u>released from the volcanic </u><u>sample</u>, thus making the results of the experiment inaccurate.
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