Briefly describe some of the changes that are already occurring in the oceans because of global warming
What will be an ideal response?
Several changes are already occurring in the oceans due to global warming. Most of the increased heat in the atmosphere has been absorbed by the oceans, so it is not surprising global surface temperatures have risen by about 0.6°C since 1970. Subsurface waters also are experiencing higher temperatures. Other changes include the melting of polar ice, changes in deep-ocean circulation patterns, rising sea level, and increases in ocean acidity, with corresponding changes in primary and secondary production.
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Which of the following is NOT a common and important element of cities in the periphery?
A) a zone of elite residential neighborhoods B) squatter zones or shantytowns C) a zone devoted to tourism D) a central zone with a concentration of commerce, industry, and retailing E) All of these are common and important elements of peripheral cities.
How many covalent bonds would the following generic atom usually form?
A) 1 B) 2 C) 4 D) 8 E) would usually not form any covalent bonds
Which numbered layer represents the youngest layer?
A. 1 B. 2 C. 3 D. 4
Oysters are an invertebrate the lives today in brackish waters along coastal zones
When a geologist working in stratified rocks observes a limestone bed with oyster fossils overlain by beds with clam and echinoderm fossils indicative of marine conditions, the fossils probably indicate ________. A) the oysters evolved into clams and echinoderms B) the oysters went extinct while these rocks were being deposited C) the environment changed as sea level rose, displacing the oysters environment with marine conditions represented by the clams and echinoderms D) There is not sufficient information to reach any conclusion from these observations.