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  2. Portal:Geography - Wikipedia

    en.wikipedia.org/wiki/Portal:Geography

    Origins of many of the concepts in geography can be traced to Greek Eratosthenes of Cyrene, who may have coined the term "geographia" (c. 276 BC – c. 195/194 BC). The first recorded use of the word γεωγραφία was as the title of a book by Greek scholar Claudius Ptolemy (100 – 170 AD). This work created the so-called "Ptolemaic ...

  3. 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.

  4. Geochemistry - Wikipedia

    en.wikipedia.org/wiki/Geochemistry

    [1]: 1 The realm of geochemistry extends beyond the Earth, encompassing the entire Solar System, [2] and has made important contributions to the understanding of a number of processes including mantle convection, the formation of planets and the origins of granite and basalt. [1]: 1 It is an integrated field of chemistry and geology.

  5. Earth science - Wikipedia

    en.wikipedia.org/wiki/Earth_science

    Physical geography is the study of Earth's systems and how they interact with one another as part of a single self-contained system. It incorporates astronomy, mathematical geography, meteorology, climatology, geology, geomorphology, biology, biogeography, pedology, and soils geography.

  6. Portal:Geology - Wikipedia

    en.wikipedia.org/wiki/Portal:Geology

    Alfred Georg Hubertus Fischer (December 12, 1920 – July 2, 2017) was a German-American geologist. Among his influential work was the examination of the climate record over geological time scales and latitudinal gradients in species diversity and numbers across geological time.

  7. Portal:Chemistry/Textbook - Wikipedia

    en.wikipedia.org/wiki/Portal:Chemistry/Textbook

    1 Chemistry in society. 2 Introduction. 3 Measurement. ... 12 Quantum theory. ... This page was last edited on 10 December 2024, ...

  8. Glossary of geography terms (A–M) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_geography_terms...

    Also amphidrome and tidal node. A geographical location where there is little or no tide, i.e. where the tidal amplitude is zero or nearly zero because the height of sea level does not change appreciably over time (meaning there is no high tide or low tide), and around which a tidal crest circulates once per tidal period (approximately every 12 hours). Tidal amplitude increases, though not ...

  9. Environmental chemistry - Wikipedia

    en.wikipedia.org/wiki/Environmental_chemistry

    Environmental chemists draw on a range of concepts from chemistry and various environmental sciences to assist in their study of what is happening to a chemical species in the environment. Important general concepts from chemistry include understanding chemical reactions and equations, solutions, units, sampling, and analytical techniques. [1]