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  2. New York Regents Examinations - Wikipedia

    en.wikipedia.org/wiki/New_York_Regents_Examinations

    Most Regents exams consist of a single three-hour testing period. The exception is the Earth Science exam, which consists of a 41-minute (approximate) laboratory component, known as the Earth Science lab practical, given around two weeks prior to the three-hour exam. The Regents exams are administered in January, June, and August.

  3. 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 ). Earth ...

  4. Geodesy - Wikipedia

    en.wikipedia.org/wiki/Geodesy

    Geodesy or geodetics [1] is the science of measuring and representing the geometry, gravity, and spatial orientation of the Earth in temporally varying 3D.It is called planetary geodesy when studying other astronomical bodies, such as planets or circumplanetary systems. [2]

  5. Internal structure of Earth - Wikipedia

    en.wikipedia.org/wiki/Internal_structure_of_Earth

    Earth's inner core is the innermost geologic layer of the planet Earth. It is primarily a solid ball with a radius of about 1,220 km (760 mi), which is about 19% of Earth's radius [0.7% of volume] or 70% of the Moon 's radius. [ 32][ 33] The inner core was discovered in 1936 by Inge Lehmann and is generally composed primarily of iron and some ...

  6. Mathematical model - Wikipedia

    en.wikipedia.org/wiki/Mathematical_model

    A mathematical model is an abstract description of a concrete system using mathematical concepts and language. The process of developing a mathematical model is termed mathematical modeling. Mathematical models are used in applied mathematics and in the natural sciences (such as physics, biology, earth science, chemistry) and engineering ...

  7. Age of Earth - Wikipedia

    en.wikipedia.org/wiki/Age_of_Earth

    In 1862, the physicist William Thomson, 1st Baron Kelvin published calculations that fixed the age of Earth at between 20 million and 400 million years. [19] [20] He assumed that Earth had formed as a completely molten object, and determined the amount of time it would take for the near-surface temperature gradient to decrease to its present value.

  8. SAT Subject Tests - Wikipedia

    en.wikipedia.org/wiki/SAT_Subject_Tests

    SAT Subject Test in Mathematics Level 2: Mathematics: 690: 101: 145,140 Formerly Math II or IIC. Consisted of algebra, geometry, trigonometry, functions, statistics and a few miscellaneous topics. 20% of all test takers reportedly attained the highest score, 800. [11] SAT Subject Test in Biology E/M: Biology: 616 (E) 647 (M) 114 (E) 110 (M ...

  9. Earth's energy budget - Wikipedia

    en.wikipedia.org/wiki/Earth's_energy_budget

    Earth's energy imbalance (EEI) Earth's energy budget (in W/m 2) determines the climate. It is the balance of incoming and outgoing radiation and can be measured by satellites. The Earth's energy imbalance is the "net absorbed" energy amount and grew from +0.6 W/m 2 (2009 est. [ 8]) to above +1.0 W/m 2 in 2019. [ 23]

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