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2. Earth - Wikipedia

   en.wikipedia.org/wiki/Earth

   [285] [286] In particular, this caused a realization of the scope of effects from human activity on Earth's environment. Enabled by science, particularly Earth observation, [287] humans have started to take action on environmental issues globally, [288] acknowledging the impact of humans and the interconnectedness of Earth's environments. [289]

3. Earth's crust - Wikipedia

   en.wikipedia.org/wiki/Earth's_crust

   Earth's crust is its thick outer shell of rock, referring to less than one percent of the planet's radius and volume. It is the top component of the lithosphere , a solidified division of Earth 's layers that includes the crust and the upper part of the mantle . [ 1 ]

4. Earth's mantle - Wikipedia

   en.wikipedia.org/wiki/Earth's_mantle

   Earth's mantle is a layer of silicate rock between the crust and the outer core. It has a mass of 4.01 × 10 24 kg (8.84 × 10 24 lb) and makes up 67% of the mass of Earth. [ 1 ] It has a thickness of 2,900 kilometers (1,800 mi) [ 1 ] making up about 46% of Earth's radius and 84% of Earth's volume.

5. 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 ).

6. Earth's internal heat budget - Wikipedia

   en.wikipedia.org/wiki/Earth's_internal_heat_budget

   Earth's internal heat flow to the surface is thought to be 80% due to mantle convection, with the remaining heat mostly originating in the Earth's crust, [16] with about 1% due to volcanic activity, earthquakes, and mountain building. [2] Thus, about 99% of Earth's internal heat loss at the surface is by conduction through the crust, and mantle ...

7. Earth's crustal evolution - Wikipedia

   en.wikipedia.org/wiki/Earth's_crustal_evolution

   Earth's crustal evolution involves the formation, destruction and renewal of the rocky outer shell at that planet's surface. The variation in composition within the Earth's crust is much greater than that of other terrestrial planets .