Which of the following rock photographs depicts a felsic igneous rock?
A. 
B. 
C. 
D. 
Answer: B
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The solvent diethyl ether can be mixed with water but only by shaking the two liquids together. After the shaking is stopped, the liquids separate into two layers, much like oil and vinegar. The free-base form of the alkaloid caffeine is readily soluble in diethyl ether but not in water. Suggest what might happen to the caffeine of a caffeinated beverage if the beverage was first made alkaline with sodium hydroxide and then shaken with some diethyl ether.
A. The water layer would turn a pink color indicating an alkaline pH. B. The caffeine would transform into the free acid and transfer into the diethyl ether. C. The caffeine would transform into the free base and transfer into the diethyl ether. D. The diethyl ether and water would mix into one layer.
Which algae was responsible for the Lake Erie harmful algae bloom causing our recent water crisis?
A. Anabaena B. Aphanizomenon C. Lyngbya D. Microcystis
A marine regression is a period of lower sea level. Indicate whether the statement is true or false
Australia’s famous Uluru (Ayer’s Rock) is what type of rock?
a. igneous rock b. asthenospheric rock c. sedimentary rock d. mantle lid rock e. metamorphic rock