Correct Answers
How did the Earth obtain the heat in its interior? - ANSWERS✔-From accretion and radioactive
decay
\Q\.What is differentiation? - ANSWERS✔-The separation of metals and rocks because of
density differences within a melted planet interior.
\Q\.if the inner core is hotter than the outer core, why is only the outer core a liquid? -
ANSWERS✔-Because the inner core is at higher pressure than the outer core.
\Q\.What is the cold, strong crust plus the outer, strong part of the mantle called? - ANSWERS✔-
lithosphere
\Q\.What is warm, weak layer of mantle beneath the rigid plates called? - ANSWERS✔-
Asthenosphere
\Q\.Which of the following are evidence that the continents have drifted over time? -
ANSWERS✔-The coastlines of the Americas line up with those of Europe and Africa like pieces of
a puzzle
b. Identical volcanic rocks appear on both sides of the Atlantic
c. Fossils of non-swimmers are found on both sides of modern oceans
d. All the above
\Q\.What are spreading centers where new ocean crust forms then spreads out called? -
ANSWERS✔-Mid-ocean ridges