Ch 12 -...

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According to the Mohs scale of hardness (see Figure 3.13 and above), what  would be the range in hardness for a mineral that scratches calcite, but not  quartz? In fact, quartz scratches the mineral. Your Answer: greater than 3 but less than 7  Approximately what percent of Earth's land area is  occupied by dry regions? 1 5 10 30 50 The differences between desert and steppe climatic types  are primarily a matter of degree. True False
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A semiarid region that often surrounds a desert is called  a(n) __________. plain tundra taiga steppe piedmont Running water, although infrequent, nevertheless does  most of the erosional work in deserts. True False Most middle-latitude deserts are located where they are  because __________. they receive too much sunlight no rivers run through them they are far removed from oceans they coincide with zones of subtropical highs all of the above
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Ch 12 -...

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