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Earth science
Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.
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Earth science > Geology 
index fossil
Earth science; Geology
A fossil that identifies and dates the strata in which it is typically found. To be most useful, an index fossil must have broad, even worldwide distribution and must be ...
index mineral
Earth science; Geology
A mineral formed under a particular set of temperature and pressure conditions, thus characterizing a particular degree of metamorphism.
inertia
Earth science; Geology
The tendency of a body to resist acceleration . A moving body tends to keep moving at a constant speed in the same direction, and a stationary body tends to remain in one place, ...
inner core
Earth science; Geology
The solid innermost part of the core with a diameter of a little over 1,200 km.
ionic radius
Earth science; Geology
The effective distance from the center of an ion to the edge of its electron cloud.
intrusive
Earth science; Geology
Pertaining to igneous rocks or features formed by the emplacement of magma in pre-existing rock.
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)