When Pablo and Johanna write up their initial proposal, the instructor will probably ________

A) tell them to start over–it would take many years to do such a study
B) tell them that they need at least 100 dogs to do the study
C) give them an A for thoroughness, and allow them to proceed with the experiment
D) tell them they have a serious problem with the proposal, but it is fixable if they are willing to take care of more dogs

Read the following scenario, and answer the questions below.

THE EXPERIMENT:
Researchers wanted to determine whether pesticide Z is effective at killing grasshoppers that typically invade cornfields. Two 10-acre cornfields located 1 mile apart were chosen. The cornfield to the west was sprayed only with water. The cornfield on the east received the same amount of water with a 10% solution of pesticide Z. The number of grasshoppers in the fields was recorded every week for 10 weeks.

RESULTS:
The number of grasshoppers in the west field treated only with water doubled after 10 weeks.
The number of grasshoppers in the east field treated with pesticide Z declined by 50% after 10 weeks.


D

Environmental & Atmospheric Sciences

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