Which of these statements about the growth of the human population is true?
a. Population growth is evenly divided with 50% of the increase coming from the developed countries and 50% from the developing countries.
b. The human population peaked in the 1960s and has been declining since.
c. The human population has been growing at a steady and constant rate since 1800.
d. The rate at which the population has been growing has slowed in the past 50 years, but the human population is still getting larger.
Answer: d. The rate at which the population has been growing has slowed in the past 50 years, but the human population is still getting larger.
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What could cause a canyon to be deeper upstream than downstream?
A) The area upstream could be uplifted more than areas downstream.
B) The area upstream is higher above base level and so results in deep erosion.
C) A steeper gradient allows more erosion upstream.
D) All of these are correct.
If the earth stopped rotating there would no longer be a Coriolis force. Indicate whether the statement is true or false
Which of the following is the smallest unit of heat?
A) calorie B) Calorie C) joule D) kilojoule
On the autumnal equinox, every place on Earth experiences 12 hours of daylight and 12 hours of darkness.
Answer the following statement true (T) or false (F)