Which of the following statements is TRUE regarding the population pyramids of China and Japan?
A) Japan faces a critical shortage of young people in future generations.
B) Japan is growing faster than China.
C) Japan and China both have high birth rates.
D) Both Japan and China exhibit high growth.
E) Japan has a younger population than China.
A) Japan faces a critical shortage of young people in future generations.
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Which of the following is not a criterion for defining something as a mineral?
A) Hard B) Orderly crystalline structure C) Naturally occurring D) Generally inorganic
The Dutch islands of the Caribbean include which of the following?
A) Montserrat, Jamaica and the Bahamas B) Aruba, Curaçao and Bonaire C) Dominica, Antigua and Grenada D) Martinique, Guadeloupe and St. Lucia E) St Vincent & the Grenadines, St. Kitts & Nevis and St. Croix
How is a cap-and-trade system used to lower air pollution?
What will be an ideal response?
Deuterium oxide, D2O, and water, H2O, have the same chemical structure and differ only in that D2O possesses the deuterium isotope of hydrogen, whereas water possesses the protium isotope
Deuterium oxide, also known as "heavy water," is 11 percent heavier than water. Might you expect its boiling temperature also to be about 11 percent greater? Why or why not? A) The mass of the molecules has a far greater influence on the boiling temperature of the substance than does the polarity of the molecules, so D2O boils at a higher temperature. B) Since they have the same chemical structures, there is a similar molecular attraction between the molecules, so their boiling temperatures are similar. C) Since deuterium is radioactive, it breaks down more easily, so it has a lower boiling temperature than water. D) Since boiling temperature is a measure of the speed of a molecule, the heavier molecules move slower and thus have a higher boiling temperature.