Puzzle Peaces

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Across
  1. 2. / Name of first satellite
  2. 7. / World's sleepiest animal, sleeping 22 hours a day
  3. 8. / Name for the wire found inside of a light bulb
  4. 11. / The use of this chemical in felt hats lead to the expression "mad as a hatter"
  5. 12. / Minutes it takes for the Sun's light to reach the Earth
  6. 15. / Type of triangle with two equal sides as well as two equal angles
  7. 16. / Longest bone in the human body
  8. 17. / Rock type in which fossils are most commonly found
  9. 19. / Rock type that forms from the cooling of magma
  10. 21. / Last name of scientist who developed the Three Laws of Motion
  11. 23. / Nokia originally sold this everyday item
  12. 24. / Olfactory nerves affect which sense
  13. 25. / First element on the Periodic Table
  14. 26. / Name for a group of whales
Down
  1. 1. / Only bird that can fly backwards
  2. 3. / Largest internal organ of the human body
  3. 4. / Only number to have its letters in alphabetical order
  4. 5. / Sound travels fastest through
  5. 6. / Hottest planet in the solar system
  6. 9. / Fastest spinning planet in the solar system
  7. 10. / The average number of pints of blood a human body contains
  8. 11. / Term for a meteor once it reaches Earth's surface
  9. 13. / The only even number that is also a prime number
  10. 14. / Angle type measuring less than 90'
  11. 18. / Top layer of the atmosphere
  12. 20. / lens type found in a magnifying glass
  13. 22. / This precious stone is a pure form of carbon