Please enable JavaScript.
Coggle requires JavaScript to display documents.
geography - Coggle Diagram
geography
types of weathering
These are freeze-thaw, onion skin (exfoliation), chemical and biological weathering. Most rocks are very hard.
Chemical weathering is caused by rain water reacting with the mineral grains in rocks to form new minerals (clays) and soluble salts. These reactions occur particularly when the water is slightly acidic
Biological weathering is weathering caused by plants and animals. Plants and animals release acid forming chemicals that cause weathering and also contribute to the breaking down of rocks and landforms.
-
Physical weathering is caused by the effects of changing temperature on rocks, causing the rock to break apart. The process is sometimes assisted by water.
volcanoes hazards
Lahars are among the most far-reaching phenomena, with deadly effects over a mean distance of more than 12.5 miles (20km).
-
Primary hazards are direct hazards from eruption such as pyroclastic flows, pyroclastic falls, lava flows and poisonous gas release. The secondary hazards are the indirect consequences such as lahars, tsunamis and epidemic disease and post-eruption famine
lava (molten rock) can erupt lave fountains or as lava flows or as steep- side domes when it is viscous
water cycle
perpetration
Precipitation is any liquid or frozen water that forms in the atmosphere and falls back to the Earth. It comes in many forms, like rain, sleet, and snow
evaporation
Evaporation is the process by which a liquid turns into a gas. Alongside condensation and precipitation, evaporation is one of the three main steps in the Earth's water cycle. Evaporation accounts for 90 percent of the moisture in the Earth's atmosphere; the other 10 percent is due to plant transpiration.
condensation
Condensation is the process where water vapor becomes liquid. It is the reverse of evaporation, where liquid water becomes a vapor. Condensation happens one of two ways: Either the air is cooled to its dew point or it becomes so saturated with water vapor that it cannot hold any more water.
surface runoff
The sum of all the water flowing over the drainage basin's surface is called runoff. It is made up of streamflow, which is flow through permanent river channels, and overland flow or surface runoff.
nuclear waste
Radioactive waste is a type of hazardous waste that contains radioactive material. Radioactive waste is a result of many activities, including nuclear medicine, nuclear research, nuclear power generation, rare-earth mining, and nuclear weapons reprocessing.
LLW makes up 90% of the volume of total nuclear waste, but only 1% of the radioactivity. The waste is compacted into containers and stored at the UK's Low Level Waste Repository at Drigg, Cumbria.
-
development indicators
To assess the economic development of a country, geographers use economic indicators including: Gross Domestic Product (GDP) is the total value of goods and services produced by a country in a year.
-
-
-
-
-
-