The mantle is composed of
A) iron and nickel.
B) iron-rich silicate rocks.
C) half liquid and half rocky material.
D) solid rock.
B
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What is true of the intertropical convergence zone?
a. It coincides with the geographical equator. b. It is the result of the convergence of a Hadley cell and Ferrel cell. c. It is subject to seasonal variations. d. It coincides with areas of strong winds.
When referring to hose, what does the "L" stand for "LDH"?
a. light b. low c. large d. limited
Continental crust is very buoyant compared with oceanic crust because continental crust is
A) predominantly composed of basaltic rock that contains many air bubbles from successive lava flows. B) predominantly composed of granitic rocks, whereas oceanic crust is composed of basaltic rocks. C) thinner than the oceanic crust, forming a thin upper skin on the oceanic crust below. D) very young and fresh.
The following items describe the conditions relating to a slump except item ________. 1. curving, scallop-shaped rupture scarp 2. broken pavement and tilted trees 3. vertical sedimentary rock layers bent downslope 4. occurring in regolith or weak rock
A) 1 B) 2 C) 3 D) 4