The planet Earth

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Across
  1. 2. the amount, level, or extent to which something happens or is present.
  2. 4. an amount of space between two things or people.
  3. 5. a quantity of something, especially the total of a thing or things in number, size, value, or extent.
  4. 6. the degree or intensity of heat present in a substance or object.
  5. 8. the outside part or uppermost layer of something (often used when describing its texture, form, or extent).
  6. 10. a body's relative mass or the quantity of matter contained by it.
Down
  1. 1. a rate, number, or amount in each hundred.
  2. 3. becoming greater in size, amount, or degree; growing.
  3. 7. the measurement from base to top or (of a standing person) from head to foot.
  4. 9. a region or part of a town, a country, or the world.