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  2. List of unsolved problems in geoscience - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Was there ever a collision of the Earth with another planet Theia, giving birth to the Moon? [1] There is compelling evidence, such as measures of a shorter duration of the Earth's rotation and lunar month in the past, pointing to a Moon much closer to Earth during the early stages of the Solar System. [2] What is the long-term heat balance of ...

  3. List of environmental issues - Wikipedia

    en.wikipedia.org/wiki/List_of_environmental_issues

    Environmental issues with war — Agent Orange • Depleted uranium • Military Superfund site (Category only) • Scorched earth • War and environmental law • Unexploded ordnance Overpopulation — Burial • Overpopulation in companion animals • Tragedy of the commons • Gender Imbalance in Developing Countries • Sub-replacement ...

  4. Outline of Earth sciences - Wikipedia

    en.wikipedia.org/wiki/Outline_of_Earth_sciences

    It is also known as geoscience, the geosciences or the Earthquake sciences, and is arguably a special case in planetary science, the Earth being the only known life-bearing planet. Earth science is a branch of the physical sciences which is a part of the natural sciences. It in turn has many branches.

  5. 50 Earth Day Trivia Questions and Answers to Inspire You to ...

    www.aol.com/lifestyle/50-earth-day-trivia...

    Try your hand at our Earth Day quiz with answers. ... Science & Tech. Shopping. Sports. Weather. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in. Mail.

  6. Earth science - Wikipedia

    en.wikipedia.org/wiki/Earth_science

    Earth science or geoscience includes all fields of natural science related to the planet Earth. [1] This is a branch of science dealing with the physical, chemical, and biological complex constitutions and synergistic linkages of Earth's four spheres: the biosphere , hydrosphere / cryosphere , atmosphere , and geosphere (or lithosphere ).

  7. Branches of science - Wikipedia

    en.wikipedia.org/wiki/Branches_of_science

    Earth science (also known as geoscience, the geosciences or the Earth sciences) is an all-embracing term for the sciences related to the planet Earth. [23] It is arguably a special case in planetary science, the Earth being the only known life-bearing planet. There are both reductionist and holistic approaches to Earth sciences.

  8. Earth-Science Reviews - Wikipedia

    en.wikipedia.org/wiki/Earth-Science_Reviews

    Earth-Science Reviews is a monthly peer-reviewed scientific journal published by Elsevier. It covers all aspects of Earth sciences. The editors-in-chief for this ...

  9. 100,000-year problem - Wikipedia

    en.wikipedia.org/wiki/100,000-year_problem

    δ 18 O, a proxy for temperature, for the last 600,000 years (an average from several deep sea sediment carbonate samples) [a]. The 100,000-year problem (also 100 ky problem or 100 ka problem) of the Milankovitch theory of orbital forcing refers to a discrepancy between the reconstructed geologic temperature record and the reconstructed amount of incoming solar radiation, or insolation over ...