Which of the following statements regarding the benefits coral reefs provide to people is correct?
A) Coral reef tourism provides some countries with over 50% of their gross national product.
B) About 300 million people worldwide depend on healthy reef systems.
C) Fisheries associated with coral reefs supply more than one fourth of all fish from the sea.
D) Coral reefs protect coasts from volcanoes, storm waves and tsunami.
E) Coral reefs contain about twice as much algal biomass as animal biomass.
A
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Which of the following factors describes why upwelling occurs along the northern California coast?
A. Seismic activity occurs on the ocean bottom. B. Winds cause surface waters to move away from the coast. C. Water level is affected by the gravitational attraction between the Earth and the moon. D. Water flows from the Atlantic Ocean into the Pacific Ocean because of their different levels.
Concerning folk and popular culture, which of the following statements is correct?
A) Folk culture is mass produced. B) Items of popular culture are individually crafted. C) In popular culture, tastes must be relatively homogeneous. D) Folk cultures tend to be spread over large areas and involve rapid change.
Which of the following is an example of heat transfer by convention?
a. water within a pan heated and flows in a circular path b. seawater drawn into a mid-ocean ridge, heated, and rises c. the rise of material beneath mid-ocean ridges coupled with subduction d. all of these
The three major types of volcanoes are ____
A)shield volcanoes, cinder cones, and lava domes B)shield volcanoes, cinder cones, and composite volcanoes C)cinder cones, composite volcanoes, and lava domes D)composite volcanoes, stratovolcanoes, and lava domes E)shield volcanoes, composite volcanoes, and stratovolcanoes