Divisions in geologic time represent ____
A)the passage of 10 million years
B)a mass extinction
C)distinct changes in the rock record
D)the onset of Ice Ages
E)the passage of 20 million years
C
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Why does Basaltic magma have the lowest viscosity?
A) Basaltic lava has more silicate. B) Basaltic lava has less silicate. C) Basaltic lava is hotter than other flows. D) Basaltic lava is less hot than other flows.
Describe the general distribution of climate types of Sub-Saharan Africa.
What will be an ideal response?
Temperature advection
A) is not a significant factor in the upper atmosphere. B) is often detected through examination of the orientation of height contours and isotherms. C) refers to the vertical movement of warm air. D) always occurs simultaneously with temperature conduction.
Match the layer of Earth to the compositional materials
A) Ferromagnesian silicates mostly in a ductile state B) Liquid nickel and iron with trace materials C) Basaltic material composing the outermost layer D) Granitic material composing the outermost layer E) Solid nickel and iron with trace materials 1) Asthenosphere 2) Inner core 3) Continental crust 4) Outer core 5) Oceanic crust