A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

× 760
The study of how the earth's atmosphere works, including weather forecasting. Use this tag for questions about the earth's weather. When asking questions specifically about the atmosphere, also includ…
× 635
The science comprising the study of the rocks Earth is composed of, and the processes by which they change. Some subfields of geology are petrology, mineralogy, and geophysics.
× 447
The gaseous envelope surrounding the *Earth*, and retained by the Earth's gravitational field. If your question is about the atmosphere on another celestial body or is more astronomy related, please a…
× 412
Questions about changes of the climate system, including questions about global warming.
× 395
a subject of natural science concerned with the physical processes and physical properties of the Earth and its surrounding space environment.
× 314
Average weather conditions for a particular area measured over multiple years or decades. For questions on climate change use the [climate-change] tag.
× 237
the branch of Earth science that studies the ocean. It is also known as oceanology.
× 225
Questions regarding large bodies of salt water known as oceans. These bodies comprise about 70% of the Earth's surface.
× 205
For help in identifying objects such as clouds. Please include as many details as possible. DO NOT ASK ROCK IDENTIFICATION REQUESTS — rock identification requests are off topic.
× 198
An objective measure of hot and cold, typically measured by a thermometer.
× 189
The science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems.
× 180
Questions about rock types, formation, chemistry, and physics. If you just want help identifying a rock please use the tag "identification-request".
× 169
The properties and behaviour of volcanoes, from the genesis of magmas to their ascent and emission at the surface of the Earth (or other planetary environments).
× 164
divided into several plates that glide over the mantle, the rocky inner layer above the core.
× 162
Questions regarding a sudden release of seismic waves into the Earth's crust. As well as the causes of earthquakes, their consequences and physics.
× 161
the study of the properties and behaviour of water. It concerns both surface as well as subsurface water, although water in the oceans and atmosphere is generally excluded. Those are stud…
× 150
For questions about the study of earthquakes and various seismic sources.
× 147
questions relating to the scientific study and identification of minerals.
× 144
A tag for questions about conceptual, analytical or numerical models used in Earth science disciplines.
× 133
concerned with or nested within the field of Geography; the study of lands, their features, and the relationships and complexities between and among peoples, the physical enviro…
× 122
Questions relating to Historical Geology.
× 106
In meteorology, a cloud refers to a visible group of liquid droplets and/or frozen crystals made of water or various chemicals, suspended in the atmosphere.
× 105
Questions related to acquiring, processing and interpreting field measurements of any kind. Including instrumentation and data analysis.
× 101
The multi-disciplinary study of the geomorphology, geology, chemistry, meteorology, oceanography, hydrology, astronomy and astrophysics of the planets and other objects within the solar system.
× 101
Questions about the application of weather data in meteorology/forecasting.
× 98
Mathematical models used for studying the dynamics of climate systems or predicting future climates.
× 93
concerns all forms of snow and ice on Earth and in space. And the marks left by ancient glaciers.
× 92
any form of moisture that falls from a cloud and reaches the ground. Precipitation can fall to the ground as rain, snow, sleet, hail, graupel... etc.
× 90
Sedimentology encompasses the study of modern sediments such as sand, mud, and clay, and the processes that result in their deposition.
× 88
Questions regarding the height of the ocean's surface.
× 84
a rapidly-rotating storm system characterized by a low-pressure center, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain. Depending on its location…
× 77
the study of rocks and the processes that lead to their formation and alteration.