Why do igneous rocks have so many uses (anything from building stone to abrasive in toothpaste)?
A) They are harmful to the environment, so we use them to prevent harm done.
B) They are very easy to attain.
C) They are strong because their finely intergrown mineral crystals are difficult to fracture along grain boundaries.
D) They are cheap.
Answer: C
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What does this curved feature, which contains a point bar, indicate about past events on Mars?
A. There were explosive volcanic eruptions. B. Glaciers once covered the entire planet. C. The surface once had running water that eroded and deposited sediment. D. Strong winds eroded into a series of volcanic layers.
Hazardous waste is best defined as waste that threatens human health or the environment because it
A. is devoid of any nutrients B. is poisonous, dangerously chemically reactive, corrosive, or flammable C. an unwanted or discarded material that is not liquid or gas. D. is in violation of anti-pollution laws E. has been disposed of improperly
The principal mineral used in making glass is:
a. quartz. b. hematite. c. talc. d. copper. e. gold.
A GIS is both an integrated software package and a computer database.
Answer the following statement true (T) or false (F)