Why are seafloor sediments useful in studying past climates?
What will be an ideal response?
Most seafloor sediments contain the remains of organisms that once lived near the sea surface. When such near-surface organisms die, their shells slowly settle to the floor of the ocean, where they become part of the sedimentary record. These seafloor sediments are useful recorders of worldwide climate change because the numbers and types of organisms living near the sea surface change with the climate. One notable example of the importance of seafloor sediments to our understanding of climate change relates to unraveling the fluctuating atmospheric conditions of the Ice Age.
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All of the following statements accurately describe the office-home building of the Rocky Mountain Institute except:
a. Solar energy provides 90% of the household electricity. b. The Institute's heating bill is just less than $50 per year. c. A central greenhouse in the building humidifies the building and helps to heat it and purify the air. d. Except for office equipment power, the building draws a little more electricity than a single 100-watt light bulb would draw. e. Solar energy provides about 99% of the hot water used in the building.
This figure indicates that starting to enrich the majority of the world's population will have the immediate result of
A) first decreasing but then increasing population growth. B) increasing population growth. C) increasing emissions of carbon dioxide (CO2). D) decreasing emissions of carbon dioxide (CO2). E) decreasing population growth.
In which decade was the first polyester synthesized?
A) 1920s B) 1930s C) 1940s D) 1950s
The earth is estimated to be approximately 4.6 billion years old. Life appeared early in the history of Earth, but metazoans (multicelled organisms) did not appear until about 600 million years ago
If the history of Earth were compressed into a single year, when would metazoans appear? A) late November B) late January C) mid-December D) late September