Engineering for Earthquakes Crossword Puzzle

QUESTIONS LIST:

• plate : _ tectonics: a geological model in which the earth's crust and upper mantle (lithosphere) are divided into a number of segments (plates) which move in response to convection currents from the lower mantle (asthenosphere).
• epicenter : the point on the earth's surface directly above the focus of an earthquake.
• crust : the outer layer of the earth, about 22 miles (35 km) deep under the continents and 6 miles (10 km) deep under the oceans. the crust sits on the uppermost part of the mantle (and together , these solid zones comprise the lithosphere).
• earthquake : a shaking of the ground caused by the sudden movement of the earth's crust or by the volcanic equivalent
• fault : the fracture or zone of fractures in a rock formation, such as tectonic plates.
• mantle : the portion of the earth, about 1800 miles 9 2900 km) thick, between the crust and the core.
• convection : _ current : the movement of the mantle. it brings the hot mantle towards surface, where it moves laterally and then falls when cool. hot mantle replaces it.
• creep : slow fault slip, occurring in a fault zone without producing earthquakes.
• boundary : where two tectonic plates meet. there are three types: convergent, divergent, and transform.
• volcano : a rupture in the earth's crust that allows lava , ash, and gases to escape from the earth mantle.
• force : any influence that tends to accelerate an object; a push or a pull
• tsunami : a long ocean wave usually caused by movements of of the ocean floor during an earthquake
• core : the central portion of the earth, having a radius of about 2100 miles (3379 km) and believed to be composed mainly of iron and nickel in the molten state.