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The broad scientific study of the origin, history, composition and structure of the Earth
A sub-discipline of geology, concerned with the shape and size of the Earth
The study of the Earth's physical properties and of the physical processes acting upon, above, and within the earth
A scientific field that studies the interactions between the physical Earth and the biosphere
The study of the chemical composition of the Earth, including its layers, surface water, and atmosphere
The outdoor game of searching for hidden objects by using Global Positioning System (GPS) coordinates
A field of study that explores the interactions between human activity and cultures with the physical attributes of the Earth's surface
The branch of mathematics concerned with the properties, relationships, and measurement of points, lines, curves, and surfaces
Relating to the heat in the interior of the Earth
The theory that the Earth is the center of the solar system and/or universe
The branch of geology that is concerned with the structure and origin of the topographical features of the Earth's surface
A hollow, usually spheroidal rock with crystals lining the inside wall
A very large, edible clam
The branch of geophysics that studies the Earth's magnetic field and associated phenomena
An electronic receiver designed to pick up seismic vibrations
The eating of earthy substances, such as clay or chalk
Divination based on geographic features, random dirt patterns or other figures/lines
The branch of geology concerned with dating of events in the Earth's history, including the origin of the Earth itself
Having an orbit in which a satellite circles the earth once per sidereal day, so that it appears stationary in relation to the Earth's surface
The ultraviolet light emanating from the outermost region of the earth's atmosphere
Movement of an organism in response to the stimulus of gravity
The growth of an organism in response to gravity (e.g., the downward growth of plant roots)
The hypothetical surface of the earth that coincides everywhere with mean sea level (i.e., without topography)
A common male given name (derived from the Greek word for farmer) - also the patron saint of England
The study of the relationship among politics and geography, demography, and economics, especially with respect to the foreign policy of a nation
