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Natural environment
Related to any physical feature of the earth's natural environment.
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Natural environment > Volcano 
mafic
Natural environment; Volcano
An igneous composed chiefly of one or more dark-colored minerals.
magma chamber
Natural environment; Volcano
The subterranean cavity containing the gas-rich liquid magma which feeds a volcano.
magnitude
Natural environment; Volcano
A numerical expression of the amount of energy released by an earthquake, determined by measuring earthquake waves on standardized recording instruments (seismographs. ) The ...
matrix
Natural environment; Volcano
The solid matter in which a fossil or crystal is embedded. Also, a binding substance (e.g., cement in concrete).
Sub-categories
- Air (43)
- Atmosphere (59)
- Climate (1147)
- Climate change (10457)
- Coral reefs (23903)
- Deserts (738)
- Earthquake (7143)
- Flood (34)
- Forests (37)
- Grassland (35)
- Land mass (144)
- Landslide (66)
- Mountains (203)
- Plateau (39)
- Speleology (1857)
- Volcano (5852)
- Water (18527)