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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 
brackish water
Earth science; Geology
Water that is lower in salinity than normal sea water and higher in salinity than freshwater ranging from 30 to 0.5 parts salt per 1000 parts water.
aerial camera
Earth science; Geology
A camera especially designed for photographing the Earth's surface from above the ground; usually carried in aircraft and Earth-orbiting satellites.
cartilaginous fishes
Earth science; Geology
Fish having a skeleton composed mostly of cartilage, as sharks and rays. Cartilage is gristle or a firm, elastic, flexible type of connective tissue.
cenozoic
Earth science; Geology
An era of geologic time from the beginning of the Tertiary period (65 million years ago) to the present. Its name is from Greek and means 'new life."
biological indicator
Earth science; Geology
An organism that is used to detect the level of chemical activity in an area, such as lichens used to detect the amount of sulphur dioxide in the air.
cut-and-fill
Earth science; Geology
A mining method which removes ore in horizontal slices and the remaining void is filled with waste rock before proceeding to mine the next slice of ore
adaptation
Earth science; Geology
Any change in the structure or functioning of an organism as a response to its environment. These changes ensure the organism is better able to survive.
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)