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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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).
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 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
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?