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Author Question: All atoms of an element have the same number of: a. ions b. protons only c. neutrons only d. ... (Read 101 times)

james0929

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on: Jul 27, 2018
All atoms of an element have the same number of:
 
  a. ions
  b. protons only
  c. neutrons only
  d. electrons.
  e. protons and neutrons

Question 2

What evidence do we have that Earth has a molten core?
 
  What will be an ideal response?


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jackie

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Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

Earthquakes produce vibrations called seismic waves that travel through the crust and interior. Pressure (P) waves travel as a series of compressions and uncompressions, and can pass through a liquid. Shear (S) waves travel as a type of side-to-side vibration that can't pass through a liquid. When an earthquake occurs, no direct S waves pass through the core to register on seismographs on the opposite side of Earth. The absence of S waves shows that the core is mostly liquid, and the size of the S-wave shadow shows that the outer boundary of the core lies slightly more than halfway between Earth's center and surface.


james0929

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Reply 2 on: Jul 27, 2018
Gracias!

debra928

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Reply 3 on: Yesterday
:D TYSM

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