What texture is displayed by the igneous rock in this photograph?
A. breccia
B. vesicles
C. porphyritic
D. glassy
E. None of these.
Answer: E
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Where in a mammal would there be the highest concentrations of phosphorous?
a. liver and pancreas b. muscle tissues c. bones and teeth d. central nervous system e. hair and skin tissues
The people using a river increase their health risks the most if they use the same area of the river for drinking, bathing and
A) washing clothes. B) public boat transportation. C) disposal of sewage. D) religious rituals.
Ice sheets can be ________
A) several kilometers thick B) tens of kilometers thick C) several centimeters thick D) several meters thick
Which is a significant source of heavy metal pollution of the atmosphere?
A. propellants B. smelters C. natural gas-burning power plants D. leaky air-conditioning systems