Climate is generally defined as average weather over a long period of time. A place or region's climate is determined by both natural and human-induced factors. Students can read an overview of Earth's climate and participate in activities which explain the following concepts: distinctions between weather and climate, variability of daily weather measurements compared to long-term climate data, how ... Full description.

This document describes how geologic time is approached in discussions of geologic topics. The uses of relative time and absolute time are compared, and a geologic time scale is provided to represent both concepts. References are provided. Full description.

This site provides information on the vast collection of deep-sea core samples that are stored in Lamont-Doherty Earth Observatory's (LDEO) facility in Palisades, New York. Materials presented here include a summary of how cores are taken, processed, and stored, some results of examinations of cores, a searchable database of the cores themselves, and a sample history database. Full description.