EARTH AND LIFE SCIENCE

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Across
  1. 5. the smallest and innermost planet in the Solar System.
  2. 7. the third planet from the Sun and the only astronomical object known to harbor life
  3. 9. all the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds.
  4. 11. the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.
  5. 12. Gabbro refers to a large group of dark, often phaneritic, mafic intrusive igneous rocks chemically equivalent to basalt, being its coarse-grained analogue
  6. 14. Astronomy is a natural science that studies celestial objects and phenomena
  7. 16. a dark, fine-grained volcanic rock that sometimes displays a columnar structure. It is typically composed largely of plagioclase with pyroxene and olivine.
  8. 17. Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius about nine times that of Earth
  9. 19. the process of eroding or being eroded by wind, water, or other natural agents.
  10. 20. a small galaxy composed of about 100 million up to several billion stars, a small number compared to the Milky Way's 200–400 billion stars.
  11. 21. Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite.
  12. 22. the breaking down of rocks, soil, and minerals as well as wood and artificial materials through contact with the Earth's atmosphere, water, and biological organisms
  13. 23. a supercontinent
  14. 25. the star at the center of the Solar System
  15. 26. a group of changes. Igneous rock can change into sedimentary rock or into metamorphic rock.
  16. 27. the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere, geosphere, hydrosphere, and atmosphere.
Down
  1. 1. the gravitationally bound system of the planets and the Sun plus other objects that orbit it, either directly or indirectly.
  2. 2. a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body
  3. 3. the fifth planet from the Sun and the largest in the Solar System.
  4. 4. the second planet from the Sun, orbiting it every 224.7 Earth days.
  5. 6. type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
  6. 8. a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.
  7. 10. a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word galaxy is derived from the Greek galaxias, literally "milky", a reference to the Milky Way.
  8. 12. a common type of felsic intrusive igneous rock that is granular and phaneritic in texture.
  9. 13. the statistics of weather over long periods of time
  10. 15. a naturally occurring chemical compound, usually of crystalline form and not produced by life processes.
  11. 18. a hydrological term, which has also been adopted in other fields in a more or less figurative sense
  12. 24. This sphere includes all the stuff that make up the crust and the core of the earth.