Distinguish aa from pahoehoe flows What will be an ideal response?
Aa has a rough, jagged, "clinkery" surface and moves slowly; pahoehoe has a smoother "ropy" surface
and can move very rapidly
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Scholars of the Ancient World
A) had a remarkable knowledge of planetary dimensions. B) were all convinced that Earth was flat. C) all lived along the eastern Mediterranean. D) made maps, but not as accurate as those made in the years 100-500 A.D. E) practiced philosophy but were not concerned with geography as we know it today.
Mining of aluminum-rich bauxite ore contributes to ________
A) soil fertility B) desertification C) coastal degradation D) soil erosion E) deforestation
What happened to the level of world trade between 1980 and the present?
A) World trade jumped from $2 trillion to over $5 trillion. B) World trade dropped from over $5 trillion to about $3 trillion. C) World trade rose from $2 trillion to $4 trillion in 1995, but has since dropped to about $3 trillion. D) World trade dropped from $4 trillion to about $2 trillion in 1995, then rose to its current level of $5 trillion E) World trade held steady between 1980 and the present.
Quartz and feldspar are members of the:
a. framework silicates b. sheet silicates c. single-chain silicates d. double-chain silicates