1)This is the layer inside the Earth that causes the movement of the Earth’s pla
ID: 231808 • Letter: 1
Question
1)This is the layer inside the Earth that causes the movement of the Earth’s plates
2) Which of the following gives the correct sequence of layers in the Earth, from the surface to the center?
3) Tectonic forces
4) __________ eruptions are gentle, and create more new crust, while __________ eruptions are more sudden, and create large pyroclastic clouds.
5) During an Earthquake, you should
6) The Earth’s magnetic field is thought to be formed in the following layer inside the Earth
A. crust B. uppermost mantel C. core D. aesthenosphereExplanation / Answer
1. Plates at our planet’s surface move because of the intense heat in the Earth’s core that causes molten rock in the mantle layer to move. It moves in a pattern called a convection cell that forms when warm material rises, cools, and eventually sink down. As the cooled material sinks down, it is warmed and rises again.
The answer is C.
2. Answer is D. crust, aesthenosphere, uppermost mantle, core.
Mechanically, Earth's layer can be divided into lithosphere, asthenosphere, mesospheric mantle, outer core, and the inner core.
3.Answer is A.warp, fold, and uplift rock.
Tectonic forces, which at the largest scale move the lithospheric plates,cause bending, warping, folding, and fracturing of Earth’s crust at continental, regional, and even local scales.
4. Answer is E. Effusive eruptions are gentle, and create more new crust, while explosive eruptions are more sudden, and create large pyroclastic clouds.
5. Answer is C. get under something sturdy
6.Answer is C.core
The heart of the Earth is a solid inner core, two thirds of the size of the Moon and composed primarily of iron. At a hellish 5,700°C, this iron is as hot as the Sun’s surface, but the crushing pressure caused by gravity prevents it from becoming liquid. Surrounding this is the outer core, a 2,000 km thick layer of iron, nickel, and small quantities of other metals. Lower pressure than the inner core means the metal here is fluid. Differences in temperature, pressure and composition within the outer core cause convection currents in the molten metal as cool, dense matter sinks whilst warm, less dense matter rises. The Coriolis force, resulting from the Earth’s spin, also causes swirling whirlpools. This flow of liquid iron generates electric currents, which in turn produce magnetic fields. Charged metals passing through these fields go on to create electric currents of their own, and so the cycle continues. This self-sustaining loop is known as the geodynamo.
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