Why might there be density changes between different parts of the same layer of the planet?
A) Different materials make up different regions of the same layer.
B) Some materials may compress when squeezed by overlying rock.
C) Repelling forces may cause some atoms to expand.
D) Differentiation is still separating materials into distinct interior layers.
Answer: B
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In a marine transgression, sediments within a sedimentary facies are deposited at the same time
a. True b. False
Faults are "locked" because ________
A) otherwise they would have earthquakes all the time B) earthquakes only form when the rocks are free to move C) elastic rebound occurs on faults D) high confining pressure increases friction on the fault E) major faults occur at plate boundaries that only move occasionally
________ are rounded masses of rock that form when molten lava erupts into cold water.
A. Pillow lava B. Dunite dikes C. Sheeted dikes D. Gabbro mountains E. Columnar basalts
What processes are thought to be occurring during formation of this astronomical event? (Image is computer generated)
A. nuclear fusion and nucleosynthesis of helium, convection in the interior, and emission of electromagnetic radiation and heat B. nuclear fusion and emission of energetic electromagnetic radiation C. nuclear fusion, gravitational attraction of material, and movement and rotation of the galaxy D. ejection of material from a star, at a high rate and in all directions