How long do low-level radioactive wastes have to be stored at disposal sites in the U. S. according to current federal guidelines?
A. 5 years
B. 50 years
C. 500 years
D. 5000 years
Answer: C
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_______ is (are) responsible for placing oxygen in the atmosphere.
A - automobile exhaust B - plants C - chlorofluorocarbons D - lighting strikes E - burning
The close-fitting mosaic of pebbles, cobbles, and boulders covering the floor of many deserts and
semiarid regions is called:a. ventifacts. b. desert pavement. c. longitudinal dunes. d. yardangs. e. barchan dunes.
What describes plant or animals species that are found in one location or region but nowhere else?
A. endemic B. native C. isolated D. local E. pandemic
What type of foliation results from the parallel alignment of abundant, coarse-grained, mica flakes in a metamorphic rock?
A. Phyllitic structure B. Schistosity C. Slaty cleavage D. Gneissic banding