The Formation of Earth

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Across
  1. 2. the hotter, more viscous portion of the mantle closer to Earth's core
  2. 4. the process by which certain unstable atoms lose energy in a predictable manner
  3. 8. a specific type of a certain atom, defined by the number of neutrons it contains
  4. 10. the part of Earth that includes all the freshwater and salt water
  5. 14. when the size of an object is reduced due to the inward pull of gravity
  6. 15. the outermost surface of Earth consisting of Earth’s crust and the uppermost portion of the mantle
Down
  1. 1. the release of gasses from Earth's interior through volcanic eruptions
  2. 3. a process by which a substance is renewed as it passes through living and nonliving
  3. 5. the outermost layer of a terrestrial planet
  4. 6. the solid hot iron-nickel sphere at the center of Earth
  5. 7. mantle the cooler but more fluid portion of Earth's mantle nearer the crust
  6. 9. the upper layer of Earth’s mantle, composed of hot slowly flowing rock
  7. 11. a physical system where energy can enter or exit the system but not matter
  8. 12. the liquid layer of nickel-iron that surrounds Earth's solid inner core
  9. 13. heat the heat produced in Earth's interior by the radioactive decay of certain atoms