Crossword puzzle #1

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Across
  1. 5. the measure of all salts dissolved in water
  2. 7. process by which plants make their own food using water, sunlight, and carbon dioxide
  3. 9. it takes Earth 24 hours to complete one
  4. 10. a storm type where wind changes direction and the air begins to rotate, classified by its funnel-shape
  5. 12. the smallest planet in our solar system
  6. 13. part of the plant where photosynthesis occurs
Down
  1. 1. it takes Earth 1 year to complete one
  2. 2. this planet spins on its side
  3. 3. these are caused by the moon's gravitational pull
  4. 4. a tool used to measure air pressure
  5. 6. the hottest planet in our solar system
  6. 8. this part of a plant anchors the plant and takes in water from the soil
  7. 11. the role of an organism
  8. 12. known as the "Red planet"