Oceanography EPSS 15. Lecture Exam #2 of this wave is: a) 20 /second b) 0.2 /second 1 A good surfing wave in the ocean might have a period of about 20 seconds, the frequency 5.0 meters/second c) 20 seconds d) e) 0.05 /second 2. Trade winds tend to be steady but fairly gentle. A common speed is about 6 meters/see. At this speed, how long would it take to blow a grain of dust from the Sahara Desert out units! over the middle of the Atlantic Ocean, a distance of about 3,000 km? Be careful with a) 2 x 10 5 sec no A CH irsbute b) 5 x 105 sec c) 2.5 x 105 sec d) 8 x 107 sec es axlnold "sb e) 2.5 x 108 sec 3. Upwelling of deep ocean water to the surface is most common: a) inside subtropical gyres. b) along western boundary currents. c) where surface currents diverge (are pulled apart). d) where surface currents converge (are pushed together). e) where pycnoclines are strong. 4. The height of a wave is the amount of time between the passage of one crest and the next crest b) amount of time between the passage of one crest and the next trough; bats on c) the climax of the era and culture in which it is created. d) horizontal distance from crest to crest. e) vertical distance from crest to trough. 5. Currents transport across the oceans, waves transport a) water ... energy b) energy ... water c) parcels ... postcards d) heat .. . salinity e) deep water ... surface water 6. How many high tides does a typical area of the ocean experience in one day? a ) b) 2 C) 3 d) 4 e) 1/2 (i.e, 1 every two days)