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13 Cards in this Set
- Front
- Back
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NAME THE 3 LAYERS OF EARTH AND EXPLAIN |
THEY ARE CORE, MANTLE AND CRUST.
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FOUR INTERESTING FACTS ABOUT THE CRUST |
1. The crust of the Earth is continental and oceanic. 2. The continental is made of granite and oceanic - of basalt. 3. The upper layer of the mantle is called "asthenosphere". 4. The oceanic crust is dense, so it sinks into the mantle.
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WHAT ARE THE "CONVECTION CURRENTS"? |
THE FLOW OF HEAT FROM ONE PART OF A LIQUID OR A GAS TO ANOTHER BY MOVEMENT OF A FLUID ITSELF.
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LITHOSPHERE |
IT IS A ZONE OF RIGID, BRITTLE ROCK WHERE THE CRUST AND THE UPPER LAYER OF THE MANTLE MEET. |
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WHY IS THE INNER CORE A SOLID IF IT IS THE HOTTEST LAYER? |
THE INNER CORE IS UNDER SO MUCH PRESSURE THAT IT DOES NOT MOVE LIKE A LIQUID, SO IT IS SOLID.
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TEMPERATURE OF THE CORE
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7000 DEGREES CELCIUS |
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DIFFERENCES BETWEEN THE CONTINENTAL AND OCEANIC CRUST |
1. CONTINENTAL - MADE UP OF GRANITE, 30 - 50 KM THICK.
2. OCEANIC - MADE UP OF BASALT, 6 - 10 KM THICK.
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NAME 2 METALS FOUND IN THE OUTER CORE |
IRON AND NICKEL |
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EFFECTS OF PLATE MOVEMENTS |
* EARTHQUAKES * VOLCANIC ERUPTIONS * FORMATION OF TRENCHES * FORMATION OF ISLANDS * FORMATION OF FOLD MOUNTAINS |
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WHAT IS THE CAUSE OF THE EARTHQUAKE OCCURANCE? |
Lateral Slipping Plate movement (Transform or Conservative plate movement) - when two plates move sideways against each other, creating tremendous amount of friction and making the movement jerky. When the pressure is released suddenly, and the plates suddenly jerk apart, it causes earthquake. |
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WHAT ARE THE OTHER CAUSES OF THE EARTHQUAKE OCCURANCES? |
1. VOLCANIC ERUPTIONS CAUSING THE SURROUNDING AREA TO SHAKE. 2. CONSTRUCTION OF DAMS. 3. BLASTING OF MOUNTAINS TO MAKE ROADS, TUNNELS, MINING, ETC. |
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EXPLAIN DIVERGING PLATE BOUNDARY |
The movement of plates are away from each other. New oceanic crust is formed. Sea floor spreading. Small earthquakes and volcanic eruptions Example (Mid Atlantic Ridge formation of Iceland).
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EXPLAIN LATERAL SLIDING BOUNDARY |
The movement of plates are sideways at different speed. Major earthquakes. The plates slip and stick with increase in pressure and friction. The plates jerk apart when pressure is released suddenly. Example (San Andreas Fault, San Francisco, California). |
