One method of surface mining is to extract the coal into long strips that follow the coal seams that are close to the surface. This is called _______________
Fill in the blank(s) with the appropriate word(s).
strip mining
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____ are used to catch large items of waste material near the point of origin.
A. Interceptors B. Drainage filters C. Vent stacks D. Traps
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Ans: b
a. 100 c. 1,000 b. 10,000 d. 10
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Lumber cut from trees is made of the ____ of the stems
a. bud scale scars c. phloem b. nodes d. xylem
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Solve this proportion.
Fill in the blank(s) with the appropriate word(s).
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