Unit 9 (Numbers and calculations) & unit 10 (Area, size and mass)

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Across
  1. 2. The natural force pulling objects toward each other, especially toward Earth.
  2. 5. Number a number without fractions or decimals, e.g., 0, 1, 2, 10
  3. 9. The distance from the center of acircle to its edge.
  4. 11. A unit of length equal to 2.54 centimetres
  5. 12. The distance around a circle; equal to2πr.
  6. 14. So small or unimportant that it can be ignored.
  7. 16. The mass of a material per unit of its volume; usually expressed in kilograms per cubic metre.
  8. 17. Mistakes or small errors in measurements or calculations
  9. 18. The number that shows how many times the base is multiplied by itself
  10. 19. Unit of length equal to 12 inches (about 30.48 cm)
  11. 20. The amount of matter in an object; constant everywhere.
  12. 21. A material or wire that allows electric current to pass easily through it.
Down
  1. 1. A group of wires twisted or bundled together, often insulated, used for transmitting electricity or data.
  2. 3. Units a system of measurement based on metres, litres, and kilograms
  3. 4. The process of finding the total when one number is taken a certain number of times
  4. 6. The longest side of a right-angled triangle
  5. 7. A part of a whole, written as one number over another (e.g. ½)
  6. 8. Next to or touching another side or angle
  7. 10. A non-conductive material placed around a conductor to prevent electric contact and energy loss.
  8. 13. Increased in volume, often by adding gas or air to reduce density.
  9. 15. A measurable extent of an object (length, width, height, or depth); determines the shape and size of an object.
  10. 22. A number that has a point separating the whole number from the fractional part, e.g., 0.75 or 3.142.