Despite this vast territory for a relatively small population, more than __________ percent of Canadians live within _____ miles of the US border.

-seventy; 200
-seventy; 50
-ninety; 50
-ninety; 150
-ninety; 100


-ninety; 150

Environmental & Atmospheric Sciences

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What is a principle that can be used to determine the age of a landscape surface?

A) A landscape surface must be older than any rocks onto which it is carved. B) A landscape surface is younger than any rock that is deposited on top of the surface. C) The highest river terrace is probably the youngest in age. D) A surface with a well-developed soil is probably older than a surface with no soil.

Environmental & Atmospheric Sciences

A deposition of till that forms behind a terminal moraine as the glacier retreats and is generally spread widely across the ground surface is called a(n)

A) outwash plain. B) till plain. C) drumlin swarm. D) lateral moraine.

Environmental & Atmospheric Sciences

Which of the following is true of all combustion reactions?

A) They are endothermic. B) They produce carbon dioxide. C) both a and b D) neither a nor b

Environmental & Atmospheric Sciences

Which of the following is NOT an external cost that affects people who are not involved in some environmentally damaging transaction?

- aesthetic damage - water pollution - human health problems - job security

Environmental & Atmospheric Sciences