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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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.
Compaction and cementation are two common processes of
A. lithification B. deposition C. erosion D. transportation
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
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.