You are hired by a pesticide company to determine whether its new pesticide ("Zap-em") is effective at controlling soybean aphids, an invasive species that costs American farmers millions of dollars a year in crop damage and control costs. Describe an
experiment you would perform to test the effectiveness of Zap-em.
What will be an ideal response?
Students' answers will vary but should include all of the following components:
A. replicate plots (It would be inappropriate to test Zap-em on a single field.)
B. treatment and control plots, assigned randomly (Zap-em plots need to be compared to plots not sprayed with Zap-em.)
C. dependent variables to be measured (e.g., crop yield, amount of crop damage, and density of soybean aphids in plots)
D. use of statistical analysis to analyze the data
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Instructions: Choose one answer from each pair of selections. A comma-shaped cloud above a low-pressure storm system indicates that the storm is DISSIPATING | DEEPENING
Scatterometers:
A) are scattered through a hurricane by an aircraft flying overhead. B) send out signals that bounce off of the debris being lifted by the winds in a hurricane. C) estimate wind speeds based on how radiation is scattered from the surface of the ocean. D) are a type of radar that is mounted to ships that sail the perimeter of hurricanes.
Which of the following is NOT a benefit of a geographic information system?
a. A GIS can store and display of many combinations of mapped data layers. b. A GIS can adjust data on different map scales and projections to fit one map. c. A GIS can be used to analyze the spatial distributions of environmental, natural, and human features. d. All of these are benefits that a GIS can provide.
Compaction and cementation are two common processes of
A. lithification B. deposition C. erosion D. transportation