What is the average distance from the earth’s surface to the center of the earth

ID: 108626 • Letter: W

Question

What is the average distance from the earth’s surface to the center of the earth? _____________km

Now study figure 17.5. What is the average range for the thickness of the crust? ______________km

Note that the earth’s crust is basically a thin veneer relative to the overall radius of the earth!

To the side draw a small diagram of the earth in cross section, showing the layering of the earth. An easy way to do this is to use the drawing tools, or do it in PowerPoint, group them and paste it in. You can also just take a picture and paste it in, see what works best for you as you will be asked to do this type of thing again.

What is the main difference between seismic reflection versus seismic refraction?

Which has a higher density, oceanic crust or continental crust?

Which on average is thickest, oceanic crust or continental crust?

What is the likely composition of the upper mantle?

What makes up the lithosphere? _____ and _____.

How thick on average is the lithosphere under oceans? _____ What about under continents? ____

The high velocity boundary that separates the crust from the mantle is termed the ______.

What is the low velocity layer below the lithosphere called?

Oceanic crust is mafic while continental crust is termed ________ and has the average composition of ________.

The p-wave shadow zone extends from ______ to _______ degrees from the epicenter.

Why do s-waves not show up on the opposite side of the earth as the epicenter (e.g. past 103 degrees)?

What materials are thought to make up the core of the earth? Where was most of this material likely derived from originally?

Vertical movement to reach equilibrium is termed _______. You notice two pieces of wood floating that have equal dimensions from the top view. Block A is floating higher than Block B. Which block extends deeper into the water column? _________

What can cause a positive gravity anomaly?

The magnetic and geographic poles are separated by about _______ degrees. On average about how long goes by before a magnetic reversal occurs? ________

What is the average geothermal gradient for the earth’s crust? _____ What about the mantle? ____

Study figure 17.23. About what temperature is the inner core? ____ What about the pressure? _____