- A reference to environmental alterations resulting from the presence or activities of humans.
- The gaseous envelope surrounding a planet or celestial body.
- Core Sample
- A sample of rock, ice, snow, soil or sediment obtained by driving a hollow tube into the undisturbed medium and withdrawing it with its contained sample or core.
- The science that uses tree rings dated to their exact year of formation to answer questions pertaining to various fields in the Earth sciences.
- Common name for a common class of algae, noted for the symetry and sculpturing of their siliceous walls.
- General Circulation Model
- Extremely complicated, computer-simulation of climate and its various components. Run on supercomputers, these models can approximate climate and give some clues to how climate has changed or might change over time.
- A large-scale wind system which predominates or strongly influences the climate of large regions, and in which the direction of the wind flow reverses from winter to summer.
- The point where the Earth is nearest the sun in the course of our planet's eliptical orbit.
- The collective functions and vital processes of an organism.
- Before Columbus.
- Scholarly Disputation
- A part of the atmosphere extending variously from six to fifteen miles above the Earth's surface.
- Sulfuric Acid
- A toxic, corrosive, strongly acid, colorless compound.
- Anything changeable.