8. You are a research scientist for the U.S. Department of Agriculture that has

Question

8. You are a research scientist for the U.S. Department of Agriculture that has been asked to research entify 4 the impact of permaculture and conventional farming methods on soil erosion. You id conventional farms, 4 permaculture farms, and 4 undisturbed natural areas. All of the farms and natural areas have streams that run nearby. Every week you measure the turbidity and sediment depth in the streams and compare the results after 2 years of data collection a. Identify the independent variable(s) from the study above b. Identify the dependant variables) from the study above. c. List 2 variables that should be controlled in this study. d. Why do you suppose 4 undisturbed natural areas were included in the study? 9. You are a biologist looking at how nest placement affects ground nesting woodland bird species such as the ovenbird and veery. You notice that nests on the edge of an area have a higher rate of predation than nests located in the interior. You hypothesize that predators may be able to find nests faster on the edges of the habitat as compared to the interior habitat. Design an experiment to test your hypothesis. What variables would you study, how hypothesis is supported or refuted? What other hypotheses can phenomenon? would you gauge whether your you come up with to explain this Science Methods: Review questionts

Explanation / Answer

Ans-8 A- the indipendant variables in the study are the numbers of different type of farms i.e. 4 conventional farms, 4 permaculture farms and 4 undisturbed areas.

Ans-B- the dependent variables include the turbidity and sediment depth of stream.

Ans-C- the two variables which should be controlled are turbidity and sediment depth of the stream.

Ans-D- four undisturbed natural area are included in this study to act as control sample.

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