the earth

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Across
  1. 5. Force with which the Earth attracts a body, by action of gravity.
  2. 6. mathematical symbol, representing a quantity given as a fraction into 100 equal parts.
  3. 7. Vertical distance between a certain object or point in space and the surface of sea level.
  4. 8. it is a metric concept that can allow to assign a measure to the extension of a surface.
  5. 9. Time interval between two people.
Down
  1. 1. a process or scale ordered in an increasing or decreasing way.
  2. 2. Make the quantity, size or intensity of something greater.
  3. 3. it is a quantity referred to the notion of heat measurable by a thermometer.
  4. 4. The outermost part of a body that limits or separates it from its surroundings.
  5. 10. Number of units, size or portion of a thing, especially when it is indeterminate.