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673.1. Air composition and usage(reactions).

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When inhaling and exhaling the air, the content of the oxygen decreases from 21 % to 16 %.
Air and its quality.
Air composition and usage(reactions).

Solve tasks to find hidden Geo point coordinates

  1. Chemistry: Gas volume calculations
  2. Geometry: Curve angle value, center angle and indrawn angle.
  3. Chemistry: Air composition and usage(reactions).
  4. Physics: mass
  5. Algebra: Rational fraction expression.
  6. Physics: Archimedes law.
  7. Geometry: Area of parallelogram, rhombus, triangle, right-angled triangle, trapeze.
  8. Physics: Spread of sound.
  9. Algebra: Fractions main property
  10. Algebra: Actual numbers.
  11. Physics: Measurement.
  12. Algebra: Moda
  13. Physics: Gravitation, friction and deformation.
  14. Algebra: Fraction amplification and abbreviation.
  15. Chemistry: Atoms un ķīmiskie elementi.
  16. Geometry: Squar, properties and signs.
  17. Algebra: Median
  18. Algebra: Absolute and relative mistake of approximation
  19. Physics: Light reflection and mirrors.
  20. Geometry: Distance between parallel straight lines.
  21. Algebra: Relative frequency
  22. Algebra: Square root extraction
  23. Chemistry: Periodic table of chemical elements and atomic structure.
  24. Algebra: Numerical approximation.
  25. Physics: Ultrasound, Infrasound and sound usage.
  26. Algebra: Albraic fraction.
  27. Geometry: Triangle median properties.
  28. Geometry: Rectangular (S = ab, a, b - edges) and area of the square (S=a^2 , a - edge) formula.
  29. Chemistry: Substances physical properties and transformations.
  30. Algebra: Square trinomial roots
  31. Geometry: Rectangle (S = ab, a, b - edges) and area of the square (S=a^2 , a - edge) formulas
  32. Algebra: Formula y = k/x
  33. Algebra: Equation with unknown denominator.
  34. Algebra: Square trinomial distribution into multipliers
  35. Geometry: Area of parallelogram, rhomb, triangle, right angled triangle and trapeze.
  36. Algebra: Parabola.
  37. Algebra: Numerical approximation.
  38. Geometry: Right-angled triangle outlined circle lines center location.
  39. Geometry: Rectangular (S = ab, a, b - edges) and area of the square (S=a^2 , a - edge) formula.
  40. Geometry: The Pythagorean Theorem. The practical application of Pythagorean Theorem in everyday life.
  41. Algebra: Fraction addition and subtraction.
  42. Geometry: Diameter, which is perpendicular to chord, properties.