A mixture of HOT gas, ash and volcanic debris travelling at high speed is called:
a) pyroclastic flow
b) mud flow
c) debris flow
d) lava flow
e) lahar
Answer: a) pyroclastic flow
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A species of barnacle is transported by boat to a new port, where it begins to colonize boats and piers. If the species begins to outcompete other species and cause harm, then it would be considered a____________________ introduced species.
Fill in the blank(s) with the appropriate word(s).
Sediment deposited directly by moving glacial ice is called _______________
Fill in the blank(s) with correct word
Rays in the rings of Saturn are bright, radial streaks that converge inward toward the planet's surface
Indicate whether the statement is true or false
Many people in the United States take trips in the spring to see annual flowers that grow and flower before they are shaded by canopy. Where are these people going?
A. Boreal forests B. Tropical rainforests C. Temperate deciduous forests D. Prairies or grasslands E. Deserts after winter rain showers