Supernovae are one of the most extreme events in the known universe. They are caused by
A. the collapse of a supermassive supergiant star.
B. the implosion of a white dwarf, which has run out of all its fuel.
C. a supermassive supergiant star undergoing a massive nuclear chain reaction.
D. any of the above
Answer: A
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Which one of the following is correct?
A. the east/northeast facing slopes of mountains on islands in the Caribbean are rain shadow environments B. the Atacama Desert is in the rain shadow of the Andes Mountains C. the Inter Tropical Convergence Zone is a belt of high pressure that forms each winter in the tropical regions of Latin America D. orographic lift is only a precipitation mechanism in the tropics - it doesn't exist in the mid/temperate latitudes
The most structurally complex animal phylum is the ____________, in which members possess a stiffening
____________, a tubular dorsal nervous system. Fill in the blank(s) with the appropriate word(s).
Sinking or subsiding air cannot form clouds due to the:
A) loss of particulates. B) removal of water vapor. C) warming temperatures. D) formation of unstable layers. E) release of latent heat.
The plague was transmitted to humans from mosquitoes.
Answer the following statement true (T) or false (F)