Explain the three stages of demographic transition as theorized by Frank W. Notestein.
What will be an ideal response?
One: In premodern times, countries experienced high birthrates and morality
rates that cancelled out each other; two: With the beginning of modernization new
scientific discoveries lead to improved health and an increased food supply. Morality
levels fall; three: Social norms and social institutions catch up with the fact that children
are likely to survive, leading to a drop in birthrate.
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Earth curves a downward distance of 5 m for each 8000-m tangent. At the end of an 8000-km tangent on the Moon the drop would be
A. more than 5 m. B. also 5 m. C. less than 5 m. D. insufficient information for an estimate
What kinds of Paleogene and Neogene deposits are found in North America’s continental interior? What was the
source of these sediments? What will be an ideal response?
What grade of metamorphism occurs at a depth of 5 km and a temperature of 300 degrees C?
A) high-grade metamorphism B) not found on Earth C) medium-grade metamorphism D) low-grade metamorphism
The contraction cycle is triggered by the rise in ________ released from the sarcoplasmic reticulum (SR).
Fill in the blank(s) with the appropriate word(s).