How Much Science Do You Know?

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Across
  1. 3. Is the basic unit of life.
  2. 7. Largest mammal on earth. (2 words)
  3. 9. Negatively charged particles that circle the nucleus.
  4. 10. Makes up 21% of the earth’s air.
  5. 11. Is a physical science that studies the composition, properties and behavior of matter.
  6. 12. Device used to measure temperature.
  7. 17. Is a muscular organ that provides blood circulation.
  8. 18. Is the natural science of matter and energy and the relationships between them.
  9. 19. One of the 3 main states of matter.
  10. 20. The resistance that one surface or object encounters when moving over another.
Down
  1. 1. The fundamental force of attraction that all objects with mass have for each other.
  2. 2. The common name for CO2. (2 words)
  3. 4. The ability to do work.
  4. 5. Is the natural science of living organisms, divided into many specialized fields.
  5. 6. The common name for H2O.
  6. 8. The blue planet.
  7. 13. It is the name for the element and is represented by the symbol H.
  8. 14. The national animal of Thailand.
  9. 15. Bones that cover the lungs.
  10. 16. Unit measurement of time.