What is luster?
a. a mineral's ability to transmit light through itself
b. the color of a mineral in powdered form
c. an indication that a mineral has double refraction
d. the quality of light reflected from a mineral's surface
e. the color of a mineral
d. the quality of light reflected from a mineral's surface
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Tidal bores mostly occur on a(n) _______ .
a elliptical diurnal tide b flood tide c neap tide d boring semidiurnal tide e
The international illegal trade in wildlife brings in an average of
a. $600,000 per year b. $600,000 per hour c. $1.1 million per year d. $500,000 per hour e. $100 million per year
Historically, ________ of the world's population has always lived in ________, at least since the beginning of written history.
A. A small percentage; rural communities B. The vast majority; rural communities C. At least half; rural communities D. At least half; urban areas E. The vast majority; urban areas
Which of the following best defines boiling point?
A) The temperature at which a solid changes to a gas B) The temperature at which a liquid changes to a gas C) The temperature at which a liquid changes to a solid D) The temperature at which a solid changes to a liquid