Oceanographers are studying the thermohaline currents to determine whether ________
A) warm water from polar and glacial melt is affecting the chemistry of the currents
B) global climate change may slow or alter their path
C) ocean water is becoming more acidic
D) they could be replaced with artificial currents if damaged by changing temperatures
E) fresh water is more dense than saltwater
Answer: B
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Which of the following statements about total fertility rate values is not true?
A) Total fertility rate values between 2 and 3 are always associated with per capita income below $12,000. B) Total fertility rate values of 5 or higher are associated with low per capita income. C) The majority of nations with total fertility rate values between 1.5 and 2.5 have high per capita income. D) The majority of nations plotted with low per capita income and total fertility rate values of 4 or higher are in Africa.
Mass extinctions are relatively rare - perhaps 6 great extinctions have occurred since the origin of life on Earth
Indicate whether the statement is true or false
Although many thousands of weather observations are taken worldwide each day, what regions still have sparse observations?
A) over high mountains and deep valleys B) over oceans and higher latitudes C) over oceans and high mountains D) over higher latitudes and deep valleys
Are fire and flood considered density dependent or density independent growth factors? Why?
What will be an ideal response?