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Tectonics- EQ1, Key idea 3
Karten in diesem Stapel (7)
- 1Seismic (Earthquake) wavesPrimary (P)- Vibrates in direction of travel, travels through solids.
Secondary (S)- Vibrates at right angle to direction of travel, travels through solid rocks.
Love (L)- Rolling motion so creates vertical ground movement. - 2Secondary hazards of Earthquakes: LiquefactionAffects poorly compacted sand and silt.
● Water moisture within soil separates from soil particles and rises to surface.
● Causes soil to behave like liquid, which can cause building subsidence
or landslides. - 3Secondary hazards of Earthquakes: LandslidesShaking by earthquake can weaken cliffs, hills & snow material.
● Unconsolidated material or loose rocks collapse & move down slope.
● Risk varies with topography rainfall, soil and land use. - 4Volcanoes: Lava flows, Pyroclastic flows, ash falls, gas eruptionsPyroclastic flow- Mix of hot rock, lava, ash, gases that move quick along earth surface.
Ash falls- Pieces of volcanic rock/ash blasted into air.
Gas eruptions- dangerous gas like carbon monoxide released into atmosphere. - 5Secondary hazards of Volcanoes: LaharsCombo of rock/mud/water which travel quickly down sides of volcanoes. Can occur when heat of eruption melts snow/ice or if eruption coincides w/ heavy rainfall.
- 6Secondary hazards of Volcanoes: JokulhlaupSnow and ice in glaciers melt after an eruption which causes sudden
floods that are very dangerous. - 7How does a tsunami occur?Oceanic crust jolted in earthquake, all
water above plate displaced up. Water pulled down by gravity. Energy transferred into water, travels like wave through it.
Gets closer to coast, sea level decreases so friction between sea bed and waves. Waves slow down & gain height, average 10ft.
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- Beschreibung
- EQ1: Why are some locations more at risk from tectonic hazards? Key idea 3: Physical processes explain the causes of tectonic hazards.
- Erstellt von
- Qashrina Collier
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