If you want to reduce the amount of energy consumed by transportation, which option should you use to get to work?
A. bicycle
B. light rail
C. high speed rail
D. hybrid electric bus
Answer: A
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Which type of logging causes the highest soil erosion rates?
A. clear-cutting B. selective cutting C. strip cutting D. no cutting
An evolutionary trend in hoofed animals in which the premolars become more like molars,
giving the animals a continuous series of grinding teeth:a. photosynthesis d. sublimation b. accretion e. molarization c. mitosis
Which compound is least likely to be washed downward from the A horizon?
A) silicate minerals B) organic matter C) potassium crystals D) magnesium minerals
The oceanic crust is composed almost entirely of ________ rocks that are underlain by ________ rocks, which makes up the lithospheric mantle
A) felsic; sediments B) intermediate; felsic C) sedimentary; mafic D) mafic; ultramafic