When Europeans arrived in Australia, what livelihood was most important to the Aborigines?
A) pastoral nomadism
B) plantation agriculture
C) hunting and gathering
D) fishing
E) swidden
C) hunting and gathering
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Shear walls are designed to ________.
A. absorb vertical forces and channel them to the outside walls B. decrease a building's period C. take horizontal forces from the floors and roofs and transmit them to the ground D. fall away from a building in non-destructive way if their shear strength is exceeded E. increase a building's period
The first effects of a hurricane are not felt on land until the hurricane actually makes landfall.
Answer the following statement true (T) or false (F)
Ocean spreading centers are highlands on the ocean floor, sometimes referred to as submarine mountains. Oceanic crust worldwide is about the same thickness so isostasy would suggest the ocean floor should be as flat as Kansas
Which of the following statements best describes the origin of these submarine mountains? A) Compression at the ridges produce local uplift along the ridge axis. B) The ridges represent upwelling zones from the core which produces a bulge at the earth's surface. C) The mantle beneath the ridges remains hot for millions of years producing an elevated region along the ridge axis because hot rocks are lower density than cold rocks. D) The ridges are sites of young volcanos that produce high topography on the sea floor, like Hawaii.
Climate models indicate that ________ is(are) one of the strongest indications of global warming
A) retreating glaciers in Alaska B) loss of sea ice in the Arctic C) melting of Antarctica D) the hole in the ozone in Australia E) El Niño