science crossword

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Across
  1. 2. dioxide / a colourless, odourless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air (about 0.03 per cent) and is absorbed by plants in photosynthesis.
  2. 3. process / (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved
  3. 4. / (Scientific-Based) You and your audience can easily detect the difference between a speaker and an expert. DJ is an expert in the fields of leadership, organizations, team-building, and safety.
  4. 7. / the rate per second of a vibration constituting a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light)
  5. 9. / an air-like fluid substance which expands freely to fill any space available, irrespective of its quantity.
  6. 11. / the ionized or ionizable constituents of a living cell, blood, or other organic matter.
  7. 14. / the strength and vitality required for sustained physical or mental activity
  8. 15. / a compound with particular chemical properties including turning litmus blue and neutralizing or effervescing with acids; typically, a caustic or corrosive substance of this kind such as lime or soda.
  9. 17. / a liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent).
  10. 18. / a substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind
  11. 19. / physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.
Down
  1. 1. / a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
  2. 5. / the smallest particle of a chemical element that can exist.
  3. 6. / a substance which does not readily allow the passage of heat or sound.
  4. 8. reaction / neutralization: a chemical reaction in which an acid and a base interact with the formation of a salt; with strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form water
  5. 10. table / relating to the periodic table of the elements.
  6. 12. / the smallest structural and functional unit of an organism, which is typically microscopic and consists of cytoplasm and a nucleus enclosed in a membrane.
  7. 13. / the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.
  8. 16. / a strong, hard magnetic silvery-grey metal, the chemical element of atomic number 26, much used as a material for construction and manufacturing, especially in the form of steel.