15 1.) glaciers have sculpted mountains and carved out valleys but no longer flow and shape the landscape today. true or false 2.) atlantic canada, located on the eastern edge of north america, has a climate this is influenced by prevailing westerly winds true or false 3.) an eco region is defined as a large area around land or water that contains a geographically distinct assemblage of natural communities. true or false 4.) the reversal of oceanic currents in the equatorial pacific is commonly called a. la niña b. orography c. el niño d. the wilson cycle 5.) what caused virtually all canada and some of northern us to be once covered by thick glacial ice almost 15,000 years ago? a. changes in the earths climate caused ice sheets to grow. b. changes in the orbit of the earth caused the ice sheets to spread across canada c. the ice sheets were widespread because they were prevalent all around the world d. there is no apparent reason why the glacial ice was present 6.) what is the major role of the forests in north america a. timber and hunting b. recreation c. source of drinking water d. all of the above 7.) these winds are found in the middle latitudes between 30 and 60 degrees latitude a. polar easterlies b. trade winds c. roaring forties. d. prevailing westerlies 8.) what are the two most important resources in canada a. fishing and mining b. timber and fishing c. oil and agriculture d. timber and oil 9.) which of the following factors make inland transportation and commerce possible i the united states a. the vast mineral deposits b. extremely fertile soils c. the intricate river systems d. ample water from snow melts 10.) what is the biggest barrier to the use of renewable energy in the united states a. reliability and consistency b. citizen opposition to negative environmental impact c. limited transportation capacity to deliver the energy to the customer d. limited renewable resources 11.) what form of renewable energy has declined in recent years a. geothermal b. wind c. hydropower d. solar