Answer:
Heat from the mantle forms convection currents causing the tectonic plates to diverge and form ocean basins.
Explanation:
Ocean basins form as a result of convection in the mantle along divergent margins.
- At a divergent margin, new crusts are being formed.
- It is said to be a constructive margin because new materials reaches through to the earth surface from there.
- The mantle convection pushes materials up and down away from heating centers and to cold regions and back and forth.
- This leads to the creation of cells which moves the overlying plate.
- The mantle materials are then able to reach the surface to form new ocean basin.
Answer:
Geomorphological processes and resultant topography are related with glacial, aeolian, fluvial and ground water movement.
- Outwash plain: <em>deposited mostly by water from melting glaciers.</em>
- Sand dunes: <em>not related to glaciation</em>
- Offshore bar: <em>not related to glaciation</em>
- Moraine: <em>deposited by glaciers</em>
Explanation:
Each and every geomorphological process has three types work. For e.g. erosional work, transportational work and depositional work.
- Outwash plain produced by fluvio-glacial depositional work where firstly glaciers melt and then the water flows and deposits sediments in a flat area.
- Moraine produced by glacial deposition. Glaciers carry sediments (pebbles, cobbles) and when it deposits in the valley floor it results a distinguished landform i.e. moraine.
- Sand dunes produced by aeolian action (depositional work). When wind receives obstacle in the form of tree or stone in its way it deposits sand in desert area and produce sand dunes.
- Offshore bar produced by marine processes. when sediments deposited in the coastal area in a huge quantity and friction take place between the wave and sea floor it creates offshore bar.
Answer:
26 cantons
Explanation:
Zürich (ZH)
Bern / Berne (BE)
Luzern (LU)
Uri (UR)
Schwyz (SZ)
Unterwalden (Obwalden (OW) / Nidwalden (NW))
Glarus (GL)
Zug (ZG)
Freiburg / Fribourg (FR)
Solothurn (SO)
Basel (Basel Stadt (BS)/ Basel Land (BL))
Schaffhausen (SH)
Appenzell (Appenzell Ausserrhoden (AR) / Appenzell Innerrhoden (AI))
Sankt Gallen (SG)
Graubünden (GR)
Aargau (AG)
Thurgau (TG)
Ticino (TI)
Vaud (VD)
Valais / Wallis (VS)
Neuchâtel (NE)
Genève (GE)
Jura (JU)
