This cloud that is NOT precipitating and covers the entire sky, forming a low blanket of clouds that causes overcast conditions. What kind of cloud is this?
A. altostratus
B. stratus
C. cirrostratus
D. nimbostratus
Answer: B
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What connects plankton in categories?
A) Evolutionary history B) Ecology C) Morphology D) Consumption methods
Outside of the crust, the layer that scientists know the most about is the mantle. Other than via seismic waves, how else do geologists obtain information about the composition of the mantle?
A) Drill cores B) Volcanoes C) Sonar D) Seismic waves
________ are objects from which light cannot escape because of the immense gravitational pull at its surface. They are produced during supernova events.
A) Neutron stars B) Black holes C) Black dwarves D) White dwarves
A community may undergo a regime shift or a phase shift when ________
A) they suffer a natural fire or flood B) lose keystone species or suffer a major climatic change C) pollutants cause a rapid rise in mutations D) all invasive and exotic species are removed E) have too many symbiotic relationships among species