Dust devils are created by
A) vertical wind shear.
B) horizontal wind shear.
C) solar heating.
D) severe thunderstorms.
E) derechos.
C
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Which of the following desert landforms is carved from solid rock rather than consisting of accumulated sediments?
A) Playa B) Inselberg C) Alluvial fan D) Bajada
Many communities are considering river floodplain restoration as a viable alternative to floodwalls and other "engineering solutions." The use of natural system restoration:
What will be an ideal response?
Considering light that passes through ice crystals, which of the following describes the colour of the wavelength that bends the least, and where this colour appears in halos or sundogs?
A. Blue wavelengths bend the least, and blue appears on the inside of halos or sundogs. B. Red wavelengths bend the least, and red appears on the outside of halos or sundogs. C. Red wavelengths bend the least, and red appears on the inside of halos or sundogs. D. Blue wavelengths bend the least, and blue appears on the outside of halos or sundogs.
If a human-induced mass extinction takes place, approximately how long will it take for life on Earth to recover?
A. 5 million years B. 200,000 years C. 5000 years D. 1 million years