Over the past decade, the salinity of high-latitude oceans has ________ due to________
A) increased; ocean absorption of excess atmospheric carbon dioxide and associated coral die off
B) declined; coastal erosion caused by changes in stream flow and increased precipitation
C) increased; higher evaporation rates associated with climate change
D) declined; freshwater inputs from melting ice
E) increased; changes in thermohaline circulation associated with the Pacific Decadal Oscillation
D
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What is a source of energy for chemosynthesis?
a. sunlight b. oxygen c. electromagnetic radiation d. carbon dioxide e. methane
At the Stockholm Convention of 2004,
A) all attending nations signed a pledge to prohibit manufacture and use of BPA. B) several of the most toxic POPs were banned or restricted. C) funds were made available to clean up toxic chemical spills in developing nations. D) the European Union lifted its ban of BPA.
Temperatures over North America suddenly cooled from 11,000 to 10,000 years ago, a period known as the ____________________ ____________________
Fill in the blank(s) with correct word
Zinc can be uniformly mixed in differing amounts in copper to an alloy called brass. Brass is an examples of which of the following?
A) compounds B) elements C) homogeneous mixtures D) heterogeneous mixtures