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- Earth (30908 bytes)
7: ...th''' or '''Terra''', is the third planet outward from the [[Sun]]. It is the largest of the [[solar s...
14: ...f approximately 12,742 km. The maximum deviations from this are the highest point on Earth (the summit...
55: ... is only 1/20,000 as great as the energy received from the Sun.
74: ...utaway-english.png|thumb|350px|left|Earth cutaway from core to exosphere. Partially to scale.]]
86: ...Peridotite|harzburgite]]s which has been observed from deep parts of the oceanic crust that have been ... - Atmospheric sciences (1139 bytes)
- Earth's atmosphere (10093 bytes)
5: .... The [[Karman line]], at 100 km (62 mi), is also frequently used as the boundary between atmosphere a...
10: * [[troposphere]]: from the surface to 7 km to 17 km, depending on lati...
11: * [[stratosphere]]: from that 7–17 km range to about 50 km, temper...
12: * [[mesosphere]]: from about 50 km to the range of 80 km to 85 km, tem...
13: * [[thermosphere]]: from 80–85 km to 640+ km, temperature increasi... - Ionosphere (19365 bytes)
1: ...practical importance because it influences [[high-frequency]] (HF) (3–30[[MHz]]) [[radio propaga...
6: ...d to as the ionosphere. In a plasma, the negative free electrons and the positive ions are attracted t...
8: ...[[recombination]] begins to take place in which a free electron is "captured" by a positive ion if it ...
10: ...t. The local winter [[hemisphere]] is tipped away from the Sun, thus there is less received solar radi...
14: ... e profile.gif|right|thumb|350px|Electron density from solar ionization during the day and night durin...
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