Life in the Universe

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Across
  1. 2. ____________Heating: The process by which gravitational forces, particularly from nearby celestial bodies, generate heat within a planet or moon, allowing for liquid water to exist.
  2. 6. ____________Equilibrium: A theory in evolutionary biology suggesting that species experience long periods of stability interrupted by brief periods of rapid evolution.
  3. 8. ____________Equation: A formula used to estimate the number of communicating civilizations in our galaxy based on various astrophysical factors.
  4. 12. ____________Cooperation: collaborative efforts among countries to conduct research and share information, especially in the context of searching for extraterrestrial intelligence.
  5. 13. ____________Haystack Problem: The challenge of finding alien signals in the vastness of space, akin to searching for a needle in a haystack.
  6. 14. The gradual development of organisms over time through natural selection and genetic variation.
  7. 15. Chemical indicators of life that can be detected in the atmosphere or on the surface of a planet.
Down
  1. 1. The ability of an environment to support life, often influenced by factors such as distance from a star and atmospheric conditions.
  2. 3. Planets that orbit stars outside of our solar system, which may have conditions suitable for life.
  3. 4. ____________ Signatures: Evidence of advanced technology that may indicate the presence of intelligent life, often sought in the search for extraterrestrial intelligence.
  4. 5. Relating to the substances involved in or produced by chemical processes, especially in the context of reactions that create life-sustaining compounds.
  5. 7. ____________Molecules: Compounds that contain carbon and are essential for life, forming the basis of living organisms.
  6. 9. ____________Rock: Rock formed by the accumulation of sediments, which can provide information about past environments and conditions.
  7. 10. The scientific study of celestial bodies, space, and the universe as a whole.
  8. 11. ____________ Fusion: A process in which atomic nuclei combine to form a heavier nucleus, releasing energy, and is responsible for the creation of heavier elements in stars.