Crossword Y6 River

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Across
  1. 3. the branch of mathematics that represents problems in the form of mathematical expressions
  2. 5. the unit measurement of frequency, equal to one cycle per second.
  3. 7. numbers that are followed by a variable
  4. 11. the combination of angles that form a straight angle (the sum is 180 degree).
  5. 12. a unit used to measure the intensity of a sound
  6. 14. able to be changed or adapted.
  7. 15. a state of numbers that does not change
Down
  1. 1. how often sound waves pass in a set of time. It can be high or low.
  2. 2. force that resists the sliding or rolling of one solid object over another
  3. 3. tells us how much energy the sound wave has.
  4. 4. based on or characterized by the methods and principles of science.
  5. 6. the space (usually measured in degrees) between two intersecting lines
  6. 7. combination of two acute angles that form a right angle (the sum is 90 degree).
  7. 8. an instance of one moving object or person striking violently against another.
  8. 9. the ability to do work
  9. 10. the order of thought or behavior; systematic planning or action.
  10. 13. how high or low a sound is.