Which of these features form because, at high altitude, air pressure differences above cold and warm air regions cause air to move from warm regions towards cold ones?
a. El Niño
b. Azores high
c. jet streams
d. polar easterlies
e. gyres
c
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Organisms contribute to soils formation by ________
A) stirring the soil to allow air infiltration B) degrading organic matter to form humus C) contributing organic matter to the soil D) all of the above
Once the elastic limit (strength) of a rock is surpassed, what is the result?
a.) brittle deformation b.) ductile deformation c.) melting d.) both brittle deformation and ductile deformation
Whether a glacier is advancing, retreating, or in a state of equilibrium, the ice forming the glacier continues to move downslope
Indicate whether the statement is true or false
On mainland Southeast Asia, what is the most common crop in the lowlands?
A) sugarcane B) rice C) rubber D) coconuts E) opium poppies