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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 
intensity
Earth science; Geology
One way to measure the strength of an earthquake. Intensity measures of the effects of an earthquake on buildings and the reactions of people. Compare with magnitude.
internal drainage
Earth science; Geology
An area in which surface water cannot reach the ocean. Any water that falls into an area with internal drainage as rain or snow does not escape out of it; not one of the streams ...
intrusion
Earth science; Geology
Emplacement of magma (molten rock) into preexisting rock. Dikes, sills, and batholiths are intrusions.
intrusive rock
Earth science; Geology
Igneous rock that cools and solidifies beneath the Earth's surface. (= plutonic rock)
island arc
Earth science; Geology
An arc-shaped chain of volcanic islands produced where an oceanic plate is sinking (subducting) beneath another.
isotope
Earth science; Geology
Atoms that differ in atomic mass number , but not in atomic number , are called isotopes. For example, oxygen (atomic number 8) may have an atomic mass number of 16, 17, or 18, ...
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)