Agriculture
Transportation and Communication
Pollution
Overuse of Resources
100
What are the three most important grains in the world?
What are wheat, corn, and rice
100
What are trains that carry workers between outlying communities and central cities?
What is a Commuter Train
100
What is the precipitation that carries abnormally high amounts of acidic material?
What is acid rain
100
What percent of the worlds wood does the US produce?
What is 15%
200
What is it called when farmers grow different crops in succession on the same land:helps preserve the soils nutrients?
What is Crop Rotation
200
What do pipelines carry?
What is natural gas, gasoline,and kerosene.
200
What is a haze cased by the sun's interaction with exhaust gas?
What is Smog
200
What does it mean to clear cut a forest?
What is to cut down all the trees in the forest
300
What industry provides services rather than produce goods?
What are Service Industries
300
What were early settlers most important means of transportation?
What were the natural waterways
300
What is Thermal Pollution?
What is the release of heated industrial water into the cooler lake water
300
What do scientists worry about clear cutting forests?
What is the loss of valuable discoveries that could be made
400
Another word for reliant on each other?
What is interdependent
400
Who was the first to build the transcontinental railroad?
What is the United States
400
What is the process in which a lake,or other body of water, becomes rich in dissolved minerals?
What is Eutrophication?
400
What caused the largest layoff in Canadian history?
What is when the government lowered cod-fishing quotas by 35% and announced the temporary closing of Newfoundland's east coast cod fishery.
500
What does NAFTA stand for?
What is North American Free Trade Agreement
500
True or False: Automobiles account for more than four-fiths of the passenger traffic in the US and Canada?
What is true
500
How can algae kill fish?
What is by using up all the oxygen in the water, leaving none for the fish
500
High-tech trawlers sweep the oceans for fish , often catching unwanted fish species,marine mammals, and birds. What is the unwanted material called?
What is bycatch
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