Building codes in many earthquake prone areas require homes and apartments to be designed to withstand a ________ Richter magnitude quake
A) 6.0 B) 5.2 C) 7.8 D) 9.3 E) 2.1
Answer: C
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ANS: C
Oxygen in itself is a very reactive element. It binds quickly to other materials. Remember, free oxygen only became abundant in our atmosphere when photosynthetic organisms began producing more. Thus, if there is a large amount of free oxygen, then there is something present that is replacing it in the atmosphere. This is likely to be a life-form of some sort. Information can be found in the section Are There Other Ocean Worlds
Mt. Taylor in the diagram has a partial volcanic neck exposed. Which type of volcanic neck is being shown?
A. with a volcano B. beneath a volcano C. above a volcano
This diagram features a(n)
A. anticyclone, Northern Hemisphere. B. anticyclone, Southern Hemisphere. C. cyclone, Northern Hemisphere. D. cyclone, Southern Hemisphere.
The formation of protons over neutrons (thus producing about a 7:1 ratio) was favored in the early universe because
A. the positively charged protons were repelled away from the explosion. B. the more massive neutrons made better targets for nucleon collisions. C. it takes more energy to create a neutron from a proton than a proton from a neutron. D. it takes more energy to create a proton from a neutron than a neutron from a proton.