A sea breeze is a local wind that blows at night from a region
A. of high elevation to low elevation.
B. over the ocean toward land.
C. of low pressure to high pressure.
D. none of the above
Answer: B
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The major difference between richness and equitability is that
A) richness is a measure of biodiversity and equitability is a measure of competition. B) richness expresses how complicated the organisms that make up an ecosystem are, while equitability only considers the number of organisms. C) richness is a count of the number of species present in an ecosystem and equitability describes how evenly distributed the populations of each species are. D) richness describes the number of r-selected species in an ecosystem and equitability expresses the number of K-selected species in an ecosystem.
Radium-226 is a common isotope on Earth, but has a half-life of about 1600 years. Given that Earth is some 5 billion years old, why is there any radium at all?
A. Radium-226 and Radium-218 undergo a series of transmutation reactions of alpha and beta decay to repeatedly become one another approximately every 1600 years. B. Radium-226 is a "daughter" isotope and the result of the radioactive decay of uranium. C. Radium-226 is one of several self-transmutating isotopes of the elements of the periodic table and is able to replenish itself so that it is never depleted. D. Radium-226 and Astatine-218 are converted back and forth via transmutation to one another at each of their respective half-life cycles.
Middle-latitude cyclonic storm systems are also known as ____
A) anticyclones B) hurricanes C) extratropical cyclones D) tornadoes
An anomaly of the element ________ marks the Cretaceous-Tertiary boundary in several locations around the world
Fill in the blank(s) with correct word