Incredible earth answers

... day a Earth' s crustmoves few miltimeters are Bigearthquakes notverydangerous buildings in moves ocean under Usualty Earth' s crust veryslowty When thereis an earthquake sometimes under Earthquakes ... changesEarth in this way, we call it erosion $! IeN.tk-s CwsJs* Findandwritethe words ffi pages Read 4-5 f Match Earth " is of years o[d Earth' s crustis mi[tions i the ocean Thepieces E...

Ngày tải lên: 09/01/2015, 10:14

... 10 6 10 8 11 0 Human influence 11 2 Farming Mining Industry and transportation Cities Environment and conservation 11 4 11 6 Glossary Index Acknowledgments 12 4 12 6 12 8 11 8 12 0 12 2 Contents Planet Earth ... The Moon Early Earth Earth’s structure Plate tectonics Continental drift Mountains Faults and rifts Earthquakes and tsunamis Volcanoes Volcanic eruptions Geysers a...

Ngày tải lên: 05/08/2014, 22:22

... dust and rock in the region of the galaxy where the Sun was born As the pieces of dust and rock orbited the star, they were pulled together by their own gravity, and the energy of these collisions ... But the various rocks and rock layers on the coasts also match, and so the fossils preserved in them The fossils also give the supercontinent a date 22 95 MILLION YEARS AG...

Ngày tải lên: 05/08/2014, 22:22

... moving east away from the rest of the continent This has allowed the central part of the valley—on the left of the picture—to sink into the Earth On average the valley is 30 miles (50 km) wide, ... lumps of coal The stickier the lava, the blockier it is, and the blocks often contain gas bubbles 31 VOLCANIC ERUPTIONS Volcanoes are among the most powerful forces...

Ngày tải lên: 05/08/2014, 22:22

... those of the Devil’s Tower The Romans used it as the basis for Hadrian’s Wall, marking the northern frontier of their empire 45 DISSOLVING LIMESTONE Rainwater dissolves carbon dioxide from the air ... blow the rock apart Rocky debris picked up by the waves completes the demolition job As these mushroom-shaped Pacific islands show, all the active erosion happens at wave leve...

Ngày tải lên: 05/08/2014, 22:22

... frequently they snap due to tension pulling the rocks apart One side of the fault drops relative to the other—or is pushed up by pressure—and the rock strata become offset By matching the layers, ... layers lie at the bottom, so if they are compressed into rock, the oldest rock layers, or strata, are also the lowest However, movements in the Earth can fold and even overtur...

Ngày tải lên: 05/08/2014, 22:22

... cling together also make them cling to the atoms of other substances such as salts, pulling them apart so they dissolve This makes water an ideal medium for the chemical reactions that are the basis ... it rise, building the clouds higher This helps fuel thunderstorms and hurricanes, and, in fact, the whole weather machine of our planet WATER ON EARTH Most of the water on Ear...

Ngày tải lên: 05/08/2014, 22:22

... toward the west in the tropics, and toward the east in the midlatitudes farther north and south They drag the surface waters of the oceans with them, creating huge clockwise current gyres in the ... from the troposphere, up through the stratosphere and mesosphere, to the thermosphere, which fades into space These layers are defined by their temperature rather than the na...

Ngày tải lên: 05/08/2014, 22:22

... of the life on Earth lives in the surface zone of the oceans Here, sunlight provides the energy for plankton and seaweeds to produce food by photosynthesis, and this supports the animals The ... least intense in the polar regions, where it is dispersed Earth spins on a tilted axis, so the regions facing the Sun most directly change throughout the year, creating the s...

Ngày tải lên: 05/08/2014, 22:22

... strip the moisture from winds blowing off the Pacific, and the lands in the “rain shadow” to the east of the mountains form the cool, dry Pampas of southern Argentina 108 NORTH AMERICAN PRAIRIE The ... ether They typically have fire-resistan t bark and thick, leathery leaves tha t resist drying out in the hot sun shine The leaves are full of oils tha t make them taste bad,...

Ngày tải lên: 05/08/2014, 22:22

... destroyed in 1923 by an earthquake Since then, it has been rebuilt in the high-rise style typical of the world’s richest cities The steel-framed towers are more earthquake-proof than traditional ... air-conditioning and that generate their own power These “zero-carbon” homes in London, UK, are designed to produce the energy they need from sources such as solar panels 10 THINKING FOR...

Ngày tải lên: 05/08/2014, 22:22

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