Which of the following is not a common type of cement in sedimentary rocks?
A) Calcite
B) Pyroxene
C) Silica
D) Iron-oxide minerals
B) Pyroxene
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?Match the term with the most appropriate description.
A. ?open, sunlit surface layer away from the shore B. ?large natural bodies of standing freshwater C. ?deeper water lying between the limnetic zone and the lake bottom D. ?lakes that have a small supply of plant nutrients E. ?land area that delivers runoff to a stream, lake, or wetland
On this map, identify the letter that is over the Atlantic Ocean.
A) A
B) B
C) C
D) D
E) Feature is not labeled.
An Earth satellite is in an elliptical orbit. The satellite travels fastest when it is
A) nearest Earth. B) farthest from Earth. C) It travels at a constant speed everywhere in orbit.
The current total world population is ________
A) 5 billion B) 6 billion C) 7 billion D) 8 billion E) 9 billion