What is the most abundant element in the Earth's crust?
A. Aluminum
B. Silica
C. Oxygen
D. Iron
Answer: C
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A country breeze blows ____
a. from the city toward the country at night b. from the city toward the country during the day c. from the country toward the city at night d. from the country toward the city during the day e. throughout the countryside at any time of day or night
Minerals that have strong bonds between flat crystal surfaces tend to
A) cleave more easily. B) show poor cleavage. C) show well-developed cleavage. D) have a well-developed streak.
Modification of ________ have reduced dolphin mortality as bycatch
A) drift nets B) gill nets C) lobster traps D) long lines E) purse seine nets
What processes were occurring when this photograph was taken or at some time in the recent past?
A. nuclear fusion, gravitational attraction of material, and movement and rotation of a galaxy B. attraction of mass by gravity, formation of stars via nuclear fusion, and emission of electromagnetic radiation C. nuclear fusion and nucleosynthesis of helium, convection in the interior, emission of electromagnetic radiation and heat D. ejection of the outer envelope of gas and plasma