Gas Crossword

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Across
  1. 3. Invisible gas formed when water evaporates.
  2. 7. Gas plants use for photosynthesis.
  3. 10. The lightest element, a component of water.
Down
  1. 1. A potent greenhouse gas often found in swamps.
  2. 2. Gas vital for human breathing.
  3. 4. A noble gas commonly used in light bulbs.
  4. 5. Most abundant gas in Earth's atmosphere.
  5. 6. An inert gas used to fill balloons.
  6. 8. Pungent gas found in cleaning products and urine.
  7. 9. A protective layer in the atmosphere blocking UV rays.