How can scientists learn about Earth's climatic history?
What will be an ideal response?
Scientists can directly measure gases known to change climate. They also can use models such as coupled general circulation models. They can drill into Earth's ice caps and glaciers to extract cores of ice, which contain trapped air bubbles of the ancient atmosphere. Atmospheric gases, temperature trends, precipitation, and solar activity can be determined from these bubbles. Scientists also collect cones of sediments at lake bottoms, which contain pollen and other plant remnants that can indicate regional climate. Plant fossils of cones, tree stems, and bark indicate vegetational and climatological history of local areas. Charcoal indicates where forest fires may have occurred. Ice core analysis has given information about climate more than 800,000 years ago, while sediment, charcoal, and other plant remains give data about more recent times.
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Which of the following statements most accurately describes the pattern of domestication in Southwest Asia and North Africa?
A) Experimentation with wild cattle, sheep, and goats 10,000 years ago led to pastoral nomadism, and later to domestication of wheat and barley and the establishment of farm settlements. B) Experimentation with wild wheat and barley 5,000 years ago was accompanied simultaneously by domestication of cattle, sheep, and goats, which led to the establishment of farming villages. C) Experimentation with wild wheat and barley 10,000 years ago led to farm settlements and domestication of cattle, sheep, and goats. D) Experimentation with wild wheat and barley 10,000 years ago was accompanied simultaneously by domestication of cattle, sheep, and goats, which eventually led to establishing farming villages. E) Experimentation with wild wheat and barley 5,000 years ago was accompanied simultaneously by domestication of cattle, sheep, and goats. Farming villages and pastoral nomadism developed together.
Oceanic ridges are geologically stable features made up almost entirely of sedimentary rock
Indicate whether the statement is true or false
If the total world population reaches 13 billion, what is one issue that consumers will need to address to maintain the population on Earth while considering carrying capacity of Earth itself?
A) Behavior, attitudes and lifestyles will need to follow a path of increasing consumption of resources. B) Resources will need to be limited in only developing countries. C) Behavior, lifestyles, and expectations will need to follow a path of minimizing consumption of resources. D) Resource demand will need to be limited in only developed countries. E) Since biocapacity will be less than carrying capacity, consumption in developing countries can increase.
Delaying action on climate change may be dangerous and more costly in the long run
Indicate whether the statement is true or false