Graham's Wicked Good Puzzle

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Across
  1. 3. A type of dog.
  2. 5. Duncan is called the city of ______?
  3. 6. The place to buy the cheapest stuff.
  4. 8. This place has been building in front of us.
Down
  1. 1. Algebra, geometry, addition.
  2. 2. Windstorms can cause these without warning.
  3. 4. What all rocks probably are.
  4. 7. This is type of music to chill to.
  5. 9. Biology, physics, chemistry.