Question 13 3 3 points when an earthquake occurs no s

Question 13 3 / 3 points
When an earthquake occurs, no S-waves are detected on the opposite side of the Earth, providing evidence that the
outer core is molten. This phenomenon is called:
Gutenberg Discontinuity
Mohorovicic Discontinuity
shadow zone
low velocity zone
seismic gap
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Question 14 3 / 3 points
The iron-rich composition of the core is based on evidence from:

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Question 15 4 / 4 points
The Earth's oceanic crust is primarily composed of this rock type:
Question 16 4 / 4 points
Which type of crust is older?
Question 17 3 / 3 points
What are chondrules?
solidified droplets of molten early solar system material
stony irons
carbonaceous chondrites
ordinary chondrites
Windmanstatten structures

Question 18 3 / 3 points
Plate tectonics is driven by convection in this layer:
Question 19 3 / 3 points
What is the name given to the outermost 100 km of the Earth that includes the crust and upper mantle?
Question 20 3 / 3 points
Approximately how thick is the Earth's oceanic crust?