The strong tendency of certain minerals to break along smooth, parallel planes is known as ________
A) cracking luster B) cleavage C) habit D) streak
B
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What property of an electron makes it possible to use electron microscopes?
A. They are electrically charged. B. They have shorter wavelengths than visible light. C. They can be generated with electricity. D. They can be focused using smaller lenses. E. none of the above
Whereas environmental preservationists advocate that certain habitats, species, and resources should be off-limits and left entirely alone, conservation approaches encourage
A) respectful and sustainable used of natural resources. B) exploitation of natural resources. C) a return to "natural" lifestyles like those lived by Native Americans. D) re-creation and reclamation of natural landscapes. E) rights for animals, trees and landscapes equal to those given humans.
Which of the following alkenes, all of which have the molecular formula C5H10, would you expect to have the lowest boiling point?
A) 4-methyl-1-pentene B) 4-methyl-2-pentene C) 2,3-dimethyl-2-butene D) 2-hexene
What one thing remains relatively constant through the seasons in tropical biomes?
A) moisture B) temperature C) faunal composition D) dry season intensity E) precipitation