________ proposed a new philosophy of water management, based on the acknowledgement that groundwater and surface water are subject to natural variations
Fill in the blank(s) with correct word
Luna Leopold
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What is the term describing an increase in concentration of toxic substances in organisms at increasing trophic levels
A. Biomagnifcation B. Primary Productivity C. Predation D. Bioremediation
How does a cross bed form?
A. a gradual decrease in the strength of the current over time B. piling of sediment down the front of a dune or ripple C. a gradual change in the climate D. an abrupt change in the composition of the sediment E. two glaciers that cross
The high temperatures in the thermosphere occur because
A) high intensity solar radiation causes strong chemical reactions with ozone, and this heats the layer to very high temperatures. B) carbon dioxide has accumulated to very high levels in this layer. C) infrared radiation from the ground heats this layer more than any other layer. D) it is in direct contact with high energy solar radiation. E) methane is such an effective greenhouse gas.
Which of the numbered features is a lahar?
A. 1 B. 2 C. 3 D. 4 E. 5