What evidence might suggest a time interval between two rock layers?
A) a metamorphosed band in the bottom layer
B) a metamorphosed band in the top layer
C) a coal layer between the two layers
D) an irregular boundary between the two layers
Answer: D
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Using the following generic atom description, choose the correct method for determining the number of neutrons. X
A) subtract G from F B) subtract F from G C) add F and G D) divide F by G E) look it up on the periodic table
Prices for solar cell systems are likely to ____.
A. increase drastically B. increase slightly C. stay about the same D. continue dropping E. drop to zero
Besides deserts, sand dunes are also commonly found in what environment?
a. karst regions b. glacial regions c. tropical rainforest regions d. permafrost regions e. coastal regions
Since 1975, the atmospheric warming on the earth has
A. experienced extreme fluctuations from hot to cold
B. increased at a more rapid pace
C. decreased
D. remained constant
E. not changed