Which of the following is defined as the bending of light rays as they pass through the atmosphere?
A) reflection
B) refraction
C) absorption
D) scattering
Answer: B
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The system responsible for defense against disease and harmful substances is the
a. circulatory system b. endocrine system c. immune system d. excretory system e. cardiovascular system
How are island arc and continental arc magmas similar?
a) Both are formed near spreading centers. b) Both are formed near hot spots. c) Both are formed near transform boundaries. d) Both are formed near subduction zones.
The Mississippi River Delta system contains a series of ________ coalescing subdeltas
A) 9 B) 7 C) 5 D) 3
What is a probable reason why land species represent 86% of the world's species, whereas marine species only represent 14%?
a) There is more land on Earth than there is ocean. b) Water slows down the evolutionary process. c) The more variable the environment, the more chances there will be for new species to form, and the ocean is more stable than the land environment. d) An underwater cataclysmic event during the Pleistocene killed many marine species, which reduced the previously abundant marine species count to less than the number of land species.