that plates and plate boundaries existed. The mid-Atlantic ridge is a constructive plate boundary where by the Eurasian and North American plates are moving apart‚ this allows magma to rise creating new plate material. This has created the island of Iceland which in itself has rift valleys which are evidence so support the plates are moving apart. Carbon dating has helped prove this theory as the crust nearer to the UK is much older than the crust along the mid-Atlantic ridge. Paleomagnetism is where
Free Plate tectonics
tectonic plates. The plates move slowly on a layer called the asthenosphere. Meteorites can tell us what the earth is like-these are rock and metal fragments which fall to earth from space. We know the earth’s core is hot through hot spring geezers and volcano lava. 2 types of crust OCEANIC CRUST: it is found under the oceans; it’s thin and has a low density as it is made from an igneous rock called basalt. It is 6-8 km thick. CONTINENTAL CRUST: this forms the land‚ made from granite which is low density
Free Plate tectonics Volcano Earth
flows are mixtures of hot gas and ash‚ and they travel very quickly down the slopes of volcanoes. They are so hot and choking that if you are caught in one it will kill you. They are also so fast (100-200 km/hour) that you cannot out-run them. If a volcano that is known for producing pyroclastic flows is looking like it may erupt soon‚ the best thing is for you to leave before it does. Some of the good ways that volcanoes affect people include producing spectacular scenery‚ and producing very rich
Free Volcano Volcanology
Alex Rogers Ms. James History 10-7 11 May 2012 Past Cultures and Their Influences Most people don’t think much about the ancient civilizations that lived all over the world where current cities and towns have been established. Some day in the future‚ people in a history class might be studying about the past (like they are supposed to) and learn about this time period and how the people now contributed to their present day life. Without the ancient civilizations‚ we would not be anywhere
Premium Indus Valley Civilization
Earthquakes are more newsworthy but we ignore other geological hazards at our peril. Discuss. (40marks) Geological hazards are events that are perceived as a threat to people‚ poverty and nature‚ which originate in‚ or transmitted by the physical‚ built or human environment. These can include volcanoes‚ hurricanes and earthquakes‚ which all have various effects ranging from affecting people to the natural and physical environment. Looking at earthquakes in particular‚ which are vibrations of the
Free Volcano Earthquake Tsunami
2. 1.1 The particles that make up an atom3 Basic sub-atomic particles‚ each has different properties. Name | Symbol | Approximate relative mass | More accurate mass | Relative charge | Proton | p | 1 | 1.0000 | +1 | Neutron | n | 1 | 1.0016 | 0 | Electron | e | Almost zero | 0.000 547 | -1 | This is the culmination of the work of 5 eminent physicists‚ Dalton‚ Thomson‚ Rutherford‚ Bohr and Chadwick.Their work basically culminates in the ideas above and the important fact that an atom consists
Premium Plate tectonics Sedimentary rock Earth
areas of the world. They glide on the mantle of the earth the plates act like a hard ridged shell (fig 2 plate tectonics) Some of the plate tectonics move very slowly each year for example in Iceland there is a visible line where the plates are moving if the plates merge together they can cause mountains and volcanos. Mountains and volcanoes are formed buy two plates colliding together and one plate gets pushed down into the earth while the other gets pushed up and creates a mountain range or volcanoes
Premium Volcano Plate tectonics Earth
eruptions on constructive boundaries; the volcanoes along these boundaries are usually on the sea floor so they don’t become a major hazard to people. They only become a problem when they emerge above the sea level and start to form islands‚ such as Iceland. Both earthquakes and volcanoes that occur along a destructive boundary cause a problem for people. Collision of an oceanic plate and continental plate can cause a range of earthquakes‚ shallow‚ intermediate and deep. Pressure that is released from
Premium Plate tectonics
“Our world faces a true planetary emergency‚” said former US Vice-President Al Gore‚ about global warming (BBC News b‚ 2007). Global warming and climate change have become very important topics of discussion‚ as they are some of the most serious challenges facing the world today. Global warming refers to the gradual increase in the temperatures of water and air on the earths’ surface (Global Warming.com a‚ 2009). The main contributor to global warming is carbon dioxide emissions. Airplanes account
Premium Global warming Emissions trading Carbon dioxide
these are listed in Table 1): Volcano Plate 1. Mount St. Helens‚ WA 2. Kilauea‚ Hawaii 3. Krakatoa‚ Indonesia Tectonic Environment ---------------------------------------------------------------------------------------------------------------------------------------------------- 4. Mount Pinatubo‚ Phillipines -------------------------------------------------5. Mount Vesuvius‚ Italy 6. Mount Pelee‚ Martinique 7. Nevado del Ruiz‚ Columbia 8. Katmai‚ Alaski 9. Laki‚ Iceland -------------------------
Free Volcano