SCIENCE

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Across
  1. 2. Light Physics
  2. 4. It is a cloud of interstellar material made up of dust, hydrogen & other gases
  3. 6. Sound Physics
  4. 11. It is the union of two kinds of gametes
  5. 12. force per unit area
  6. 13. It is a mountain whose slopes is rise steeply into air
  7. 14. This are like deep canals on the seafloor
  8. 15. a substance tending to flow
Down
  1. 1. It refers to the earliest stage of development of an organism
  2. 3. the study of heat movement
  3. 5. It is where the water is stored underground
  4. 7. the study of matter and energy
  5. 8. It is a explosion of a star
  6. 9. It is an area where runoff drains into a river, stream, lake reservoir or ocean
  7. 10. It is a break in the ground along which movement has taken