Science and Nature

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Across
  1. 6. Reef A diverse underwater ecosystem built from coral
  2. 7. A community of living organisms interacting with their environment
  3. 11. Eruption The release of magma and gases from a volcano
  4. 13. Borealis The natural light display seen in polar regions
  5. 14. A geological formation that erupts with lava
  6. 15. A large sea wave caused by underwater earthquakes
  7. 16. The process by which soil and rock are worn away
  8. 18. A small celestial body that enters Earth's atmosphere
  9. 19. A gas essential for respiration in most living organisms
  10. 20. The force that attracts objects towards the Earth
Down
  1. 1. The process by which plants make their own food
  2. 2. The transfer of pollen from male to female parts of flowers
  3. 3. A cold, treeless biome found in polar regions
  4. 4. A state of inactivity during cold months
  5. 5. The largest body of water on Earth
  6. 8. System The collection of planets and other celestial bodies orbiting the Sun
  7. 9. The preserved remains of ancient organisms
  8. 10. Extinct reptiles that lived millions of years ago
  9. 12. The pigment in plants that makes them green
  10. 17. Insects that play a crucial role in pollination