Warm Up – Page 78Warm Up – Page 78
Answer this on page 78 in your notebook:Mrs. Wilson, I still don’t get
_________________. Could you explain it again?
11
P-Waves – move back and forth and through liquids and solids
S-Waves – move up and down and side to side and only through solids
By studying seismic waves, scientists realized the outer core is liquid
22
Temperature, pressure, and density all increase
33
Because of the intense pressure
44
In the ocean – oceanic crust
55
The lithosphere
66
The asthenosphere
77
Inner core – solid and outer core – liquid
88
The movement of the liquid outer core
99
Lower mantle
1010
All the continents were once part of a supercontinent. The continents separated and drifted to their present locations over time.
1111
He could not explain the mechanism that could move the continents
1212
Geologic – fit of South America and AfricaFossil – various fossils found in places
where the animals could not have traveled by water
Climate – tropical climate fossils found in cold areas; glacier deposits in Africa
1313
Mountains formed at oceanic-oceanic divergent plate boundaries
1414
As plates diverge, the sea floor spreads – or becomes larger; on the other side of the world, plates subduct so that the earth does not get larger
1515
Older rocks were farther from the ridge and younger rocks were near the ridge
The magnetic patterns in the rocks from the magnetic field reversals
1616
Deep ocean trenches are created at subduction zones as the older piece of plate once again becomes part of the mantle
1717
Oceanic crust – more dense – basaltContinental crust – less dense - granite
1818
The plate that is more dense will subduct under the less dense plate; trenches, volcanoes, and mountains can form
1919
Divergent – two plates move away from each other
Convergent – two plates move towards each other
Transform –two plates slip past each other
2020
Mountain ranges
2121
Deep ocean trenches and volcanic mountain ranges
2222
Deep Ocean Trenches, Volcanoes, and Island Arcs
2323
Rift valleys and volcanoes
Essay - DiagramEssay - Diagram
Essay - WrittenEssay - Written