Ancient Oceanic Inventions

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Across
  1. 5. The study of the universe and celestial objects
  2. 6. This is a large instrument that sends a booming sound, can be heard from miles away
  3. 7. They invented this technology to travel across the ocean
Down
  1. 1. They would make this material by burning natural resins from trees
  2. 2. The earliest version of this body art comes from Oceanic civilizations
  3. 3. This tool can be both a toy or a weapon, you throw it and it comes back
  4. 4. They created these as a way to catch their food from the ocean