What type of reef is a ring-shaped island of coral?
a. Fringing
b. Barrier
c. Atoll
d. Mangrove
ANS: C
Atolls are ring-shaped islands of coral reefs. The center of these reefs has a lagoon. The coral is not
successful within the lagoon so there can be an accumulation of coral debris. Some of these islands are
able to sustain palm trees in the center?the true image of a tropical island. Information can be found
in the section Biological Activity Forms and Modifies Coasts.
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Determine if the phrase in bold applies to only contact metamorphism, only regional metamorphism, both types of metamorphism or neither type of metamorphism. Found in mountain belts
A. Both contact and regional metamorphism B. Only contact metamorphism C. Only regional metamorphism D. Neither contact or regional metamorphism
If new seafloor is being created at spreading centers, why don't we find a lot of old oceanic crust on the surface of the Earth? Because oceanic crust is being ____ where it collides with continental plates.
A ) folded B ) pushed up C ) subducted D ) vaporized
An empirical classification is based on, among other factors
A) the origin or genesis of the climate. B) the interaction of air masses. C) the mean annual temperature and precipitation of an area. D) causative factors.
In which of the following conditions do secondary rainbows occur?
A. when light refracts through a cloud of large raindrops B. when two internal reflections of light occur in raindrops C. when light refracts through ice crystals D. when a single internal reflection of light occurs in raindrops