Which of these foods yields a higher water footprint?
A. strawberries from San Joaquin Valley, CA
B. oranges from Florida
C. corn from Iowa
D. blueberries from Maine
Answer: A
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Why didn't ice gather in central and northern Alaska in the last ice age?
A) Proximity to the sea kept it too warm. B) The climate at that time was tropical. C) There was too little precipitation. D) There was too much geothermal heating from volcanic action.
What has caused changes to the water level in the High Plains aquifer?
A) erosion B) irrigation C) increasing urban demand D) tectonic plate movement
Most tornadoes are fairly weak, ranking low on the EF-scale
a. True b. False Indicate whether the statement is true or false
The above map is an example of a
A) Robinson Projection map. B) Azimuthal equidistant projection map. C) Mercator projection map. D) cartogram. E) choropleth map.