Known Paragraphs Flashcards
Explain how folding happens- Key words used:Folding, destructive plate boundaries, anticline, cycline, heat, bendable, rock layers, Indian, Eurasia, Himalayas
Folding happens at a destructive plate boundary when great pressure leads to very high heat. This softens the layers of rock making the rock more bendable and easier to fold, creating fold mountains. The upward folds of rock are called anticlines and the downwards fold is called cyclines. E.g The Himalayas when the Indian and the Eurasia plates collide, the Himalayas were formed in the alpine folding period
Explain the formation of one igneous rock- need to involve- extrusive, cools, hsolidifies, element, crystals, lava, County Antrim, the Giants Causeway
Basalt forms when lava comes out from a volcano or fissure. The lava cools rapidly as it is exposed to the elements and solidifies forming miniature crystals. Basalt is an extrusive igneous rock because it is formed on the earths surface, humans interact with basalt when we use road chip-pings e.g The Giants Causeway Co. Antrim
Describe a volcano eruption- Need to involve- Destructive plate boundary, hotspot, magma/lava, magma, magma chamber, crater, ash,pyroclasts, Mt St Helens 1980 America
The most violent eruptions happen at destructive plate boundaries and hotspots. Before an eruption, magma and gases buildup in the magma chamber. When the pressure becomes too great, the volcano erupts through a pipe called the vent ejecting ash and rock fragments. These materials are known as pyroclasts. The top of the volcano can be blown off ,and the hole left is called a crater, e.g Mount Saint Helens 1880 eruption Washington State USA
Describe how an earthquake takes place- need to involve- destructive plate boundaries, fault lines, focus, epicentre, shockwaves, tsunami, Japan 2011
Most major earthquakes happen at destructive plate boundaries and faults. Over Decades pressure builds up at a point called a fault line. When the pressure becomes too high one plate slips releasing energy called an earthquake. Energy is let out from the focus, this Energy goes out in waves, causing shockwaves. Most damage is caused at the epicentre, the epicentre is right above the focus Earthquakes beneath the ocean can form a massive wave called a tsunami, the strength of a volcano can be measured on a ri. E.g Japan Tsunami and earthquake 2011
