Journey to Etna : civil protection.
| Other author | Glasshead Productions, producer. |
| Format | Video (Streaming) |
| Publication Info | [London] : Teachers TV/UK Department of Education, 2009. |
| Description | 1 online resource (6 min.). |
| Supplemental Content | Journey to Etna: lava flow and gas emissions |
| Supplemental Content | Journey to Etna: civil protection |
| Subjects |
| Variant title | Journey to Etna : lava flow and gas emissions |
| Series | How science works ; 3-4 How science works ; 3-4. ^A1159725 |
| Abstract | This clip builds on the concept of constructing lava barriers which is introduced in the main programme.It's not possible to prevent an eruption from happening, but scientists can predict when one will happen and suggest the best course of action for protecting the local towns from the destructive lava flows. Computer modellers at the Institute of Volcanology in Catania use data collected from the volcano, such as thermal imaging, to predict the path of the lava flows. Civil protection authorities then use this information to construct barriers of old lava to divert the flow of fresh lava away from the towns. |
| Abstract | Molten rock below ground is called magma, but when it erupts above ground it's known as lava. When the lava flows cool and solidify they form igneous rock. Depending on the mineral composition of the lava, it will cool and form two distinctive structures, known as aa and pehoehoe.Volcanoes also emit huge amounts of gases when they erupt, such as carbon dioxide and sulphur dioxide, and they even emit gold. Major eruptions can significantly alter the earth's atmosphere for years. |
| General note | Title from resource description page (viewed Mar. 5, 2012). |
| Other forms | Previously released as DVD. |
| Language | This edition in English. |
| Genre/form | Instructional television programs. |
Availability
| Library | Location | Call Number | Status | Item Actions |
|---|---|---|---|---|
| Electronic Resources | ✔ Available |