What was the astronomer Eratosthenes responsible for? A) ...

[fbq8i]

What was the astronomer Eratosthenes responsible for?
 
  A) calculating that a rotating planet would not be perfectly spherical
  B) determining the mass of Earth
  C) determining that the Earth has a distinct concentration of high-density material near the center
  D) using simple surveying and measurements of shadows in sunlight to estimate Earth's size

Question 2

What is the correct order of the layers of the Earth?
 
  A) mantle, continental crust, oceanic crust, inner, and outer core
  B) continental crust, oceanic crust, outer core, mantle, inner core
  C) continental crust, oceanic crust, mantle, outer core, inner core
  D) outer core, oceanic crust, continental crust, mantle, inner core

[morrie123456]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: C

[fbq8i]

Excellent

[nothere]

Gracias!