BELLRINGER How close a group of measurements are to each other is called 1. estimation 2. accuracy 3. precision 0% 0% 0% 0% 4. percent error estimation accuracy precision percent error
Inside Earth Chapter 1 Section 1 Earth s Interior
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Watch the video: On which two continents were fossil bones of Brachiosaurus found?
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I. Exploring Inside Earth A. Earth s Center is 6,000 km deep B. How we learn 1. Direct evidence a. Rock samples 2. Indirect evidence a. Seismic waves b. Speed & paths reveal structure
II. Journey to Earth s Center A. Three layers of earth B. Temperature increases with depth 1. Heat from Earth s formation 2. Radioactive decay C. Pressure also increases 1. More rock pressing down
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III. The Crust A. Outer layer 1. Dry land a. Continental crust b. Granite 2. Ocean floor a. Oceanic crust b. Basalt
B. Thinnest layer 1. 5 40 km thick 2. Up to 70 km beneath mountains
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IV. Mantle hot rock A. Lithosphere stone 1. Uppermost mantle & crust 2. Approximately 100 km thick B. Asthenosphere 1. Bendable rock C. Lower mantle 1. Still solid
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V. Core A. Outer core 1. Molten metal 2. Iron (Fe) & Nickel (Ni) 3. Movement causes magnetic field B. Inner core 1. Solid metal a. High pressure
- Earth s Interior The Core The core is made mostly of the metals iron and nickel. It consists of two parts a liquid outer core and a solid inner core.
Holes drilled several kilometers into Earth s crust provide direct evidence about Earth s interior in the form of 1. seismic waves. 2. rock samples. 3. liquid iron. 0% 0% 0% 0% 4. volcanic eruption. seismic waves. rock samples. liquid iron. volcanic eruption. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Geologists obtain indirect evidence about Earth s interior by 1. measuring pressure differences at Earth s surface. 2. estimating temperature inside earth. 3. directly looking under the many layers. 4. recording and studying seismic waves. measuring pressure d... 0% 0% 0% 0% estimating temperatur... directly looking unde... recording and studyi.. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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- Earth s Interior Temperature Inside the Earth The graph shows how temperatures change between Earth s surface and the bottom of the mantle. On this graph the temperature at the Earth s surface is 0 o C. Study the graph carefully and then answer the questions.
- Earth s Interior Temperature Inside the Earth Reading Graphs: As you move from left to right on the x-axis, how does depth inside the Earth change? The depth increases.
- Earth s Interior Temperature Inside the Earth Estimating: What is the temperature at the boundary between the lithosphere and the asthenosphere? About 1,600 o C
- Earth s Interior Temperature Inside the Earth Estimating: What is the temperature at the boundary between the lower mantle and the core? About 3,200 o C
- Earth s Interior Temperature Inside the Earth Interpreting Data: How does temperature change with depth in Earth s interior? It generally increases with depth.
What is the correct order (starting from the surface) of Earth s layers? 1. crust, outer core, inner core, mantle 2. mantle, outer core, inner core, crust 3. crust, mantle, outer core, inner core 4. outer core, inner core, crust, mantle crust, outer core, inne... 0% 0% 0% 0% mantle, outer core, inn.. crust, mantle, outer c... outer core, inner core... 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Earth s inner core is 1. a dense ball of solid metal. 2. a layer of molten metal. 3. a layer of hot rock. 4. a layer of rock that forms Earth s outer skin. a dense ball of solid... 0% 0% 0% 0% a layer of molten metal. a layer of hot rock. a layer of rock that f... 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30