surveys the major useful organic and mineral substances that are found in the earth's crust. shows how they are extracted and processed, how they are... - 岩石圈 個影片檔及 b 捲影像00:30
earthquakes and volcanoes often occur in areas where mountains form as the earth's crust is folded and cracks appear. many regions of earthquakes and... - 岩石圈 個影片檔及 b 捲影像00:33
earthquakes and volcanoes often occur in areas where mountains form as the earth's crust is folded and cracks appear. many regions of earthquakes and... - 岩石圈 個影片檔及 b 捲影像00:28爆炸
sodium is the sixth most abundant element in the earth's crust and exists in numerous minerals such as table salt and is an essential element for... - 岩石圈 個影片檔及 b 捲影像00:28
what is ecology? (2nd edition) - part 25 of 36. outstanding photography of natural life helps to define and illustrate basic terms in the science of ecology. the film gives a general definition of ecosystem, and also describes specific ecosystems: forest, - 岩石圈 個影片檔及 b 捲影像00:28
what is ecology? (2nd edition) - part 24 of 36. outstanding photography of natural life helps to define and illustrate basic terms in the science of ecology. the film gives a general definition of ecosystem, and also describes specific ecosystems: forest, - 岩石圈 個影片檔及 b 捲影像00:31
rescuers move body from rubble after earthquake in california. destroyed hospital in california. sheriff helps with rescue mission - 岩石圈 個影片檔及 b 捲影像00:27
modern utilities failed during california earthquake. rescue effort after earthquake in california - 岩石圈 個影片檔及 b 捲影像00:24海嘯
foundations of modern hospital in california after earthquake. highway reduced to rubble after california earthquake. buckled railroad tracks.... - 岩石圈 個影片檔及 b 捲影像00:32
collapsed house and broken windows in gediz after earthquake. survivors sit in street after earthquake. destroyed village of gediz. earthquake in... - 岩石圈 個影片檔及 b 捲影像00:39
ladies wash clothes in polluted stream after earthquake. sanitation problems after earthquake, geologists investigate earthquake in turkish village - 岩石圈 個影片檔及 b 捲影像00:36
survivors of turkish earthquake receive emergency food supplies from land rover vehicle. people hold out bowls for food. children queue for food.... - 岩石圈 個影片檔及 b 捲影像00:29
broken glass on building in gediz after earthquake. survivors in gediz after earthquake. land rover brings food supplies to survivors in gediz. lady... - 岩石圈 個影片檔及 b 捲影像00:29
survivors carry furniture and possessions through streets in gediz after earthquake. man carries chair through ruins. survivors return to gediz.... - 岩石圈 個影片檔及 b 捲影像00:31天災
earthquake damage in mountains in turkey. stresses in rock masses along fault. collapsed buildings after earthquake. speaker in turkish village - 岩石圈 個影片檔及 b 捲影像00:36
man gathers belongings after earthquake in village. survivors of earthquake in gediz. concrete pillar in destroyed village. bust of ataturk.... - 岩石圈 個影片檔及 b 捲影像00:34
roof tiles on collapsed house. wooden shutters on collapsed building. survivors wander around collapsed homes after earthquake - 岩石圈 個影片檔及 b 捲影像00:34
collapsed mosque and church objects on ground after 1970 earthquake in gediz. concrete from collapsed mosque. tree by mosque. man looks through... - 岩石圈 個影片檔及 b 捲影像00:28
collapsed homes in gediz village after earthquake. destroyed houses and collapsed mosque - 岩石圈 個影片檔及 b 捲影像00:30
geologists follow rift in ground. snow by rift in ground. man pokes stick into rift. town in turkish mountains. 1970 gediz earthquake aftermath.... - 岩石圈 個影片檔及 b 捲影像00:32
earthquake magnitude on richter scale calculation. 7.1 major earthquake reading on richter scale. geologists walk along rift in ground in mountains... - 岩石圈 個影片檔及 b 捲影像00:29
seismologist estimates earthquake magnitude with seismograph and ruler. waves after the p waves were recorded on seismograph. richter scale... - 岩石圈 個影片檔及 b 捲影像00:36
animation of planet earth and seismic waves originating in turkey. seismograph of earthquake. man measures seismograph recording - 岩石圈 個影片檔及 b 捲影像00:21
seismologist collects data in berkeley, california. seismograph data. man records data. movement of p waves recorded across network. hand holds... - 岩石圈 個影片檔及 b 捲影像00:33
p wave recorded on seismograph. micro-amperes reading during p waves. man measures time interval between p waves - 岩石圈 個影片檔及 b 捲影像00:34
seismic activity recorded at berkeley, california during earthquake. needle on meter shows micro-amperes recording. p waves recorded on seismograph.... - 岩石圈 個影片檔及 b 捲影像00:32
broken clock and rocks. earthquake recording system in berkeley, california. one minute intervals on seismograph - 岩石圈 個影片檔及 b 捲影像00:35
continental drift: the theory of plate tectonics- part 12 of 39. here's a comprehensive exploration of continental drift and its effect on the shapes and location of landmasses. outstanding location footage as well as concise diagrams, maps, and animation - 岩石圈 個影片檔及 b 捲影像00:31
time-lapse america side sunrise on earth from space different regions from different angles background stock video - 岩石圈 個影片檔及 b 捲影像00:10地球
time-lapse middle-east sunrise on earth from space different regions from different angles background stock video - 岩石圈 個影片檔及 b 捲影像00:10
time-lapse indian side sunrise on earth from space different regions from different angles background stock video - 岩石圈 個影片檔及 b 捲影像00:10
time-lapse asia side sunrise on earth from space different regions from different angles background stock video - 岩石圈 個影片檔及 b 捲影像00:10地球
time-lapse sunrise on earth from space different regions from different angles background stock video - 岩石圈 個影片檔及 b 捲影像00:10
time-lapse asia and europe side sunrise on earth from space different regions from different angles background stock video - 岩石圈 個影片檔及 b 捲影像00:10
time-lapse european side sunrise on earth from space different regions from different angles background stock video - 岩石圈 個影片檔及 b 捲影像00:10
