Compare the continental crust with oceanic crust in terms of composition and thickness. What will be an ideal response?
Continental crust is complex, consisting of all rock types, but is usually described as granitic. It
averages 35 km thick. Oceanic crust is comparatively simple, consisting of gabbro in its lower part and
overlain by basalt. Its thickness ranges from 5 to 10 km.
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Which of the following is NOT happening in the area shown by this figure?
A. eruptions onto the seafloor B. release of water by a descending plate C. faulting D. melting of rising mantle E. plates are moving apart
Since 1945, approximately ____ species of insects and rodents have developed resistance to one or more insecticides
a. 50 b. 500 c. 1,000 d. 2,000 e. 5,000
The ________ is Southeast Asia's longest waterway
A) Red River B) Chao Phraya River C) Mekong River D) Irawaddy River E) none of the above
The loss of volatile elements in organic material, leaving only a thin dark film behind, is the
process of _______. Fill in the blank(s) with the appropriate word(s).