Physical weathering is the disintegration of earth material without undergoing a chemical change. Physical weathering results in increased surface area for chemical reactions to occur on.
Tsunamis- results of underwater earthquake- Tidal Wave
Actually s and p waves traveling from the focus
P wave does damage since s wave disappears right away.
Damage done by a tsunami is not just water- it is the also the large
Amount of sediment that washes up and the huge amount of
Erosion that exists as the water washes everything away.
Typically we can be warned of a tsunami because the earthquake
Occurs and we can expect a tidal wave to come once we
Determine that the epicenter is below the water.
The focus of this class lesson was on how the Hawaiian Islands formed. The lab focused on the direction and speed of the Pacific Plate and the age of the islands. Click here for the Power Point. Click here for the discovery networks virtual volcano.
Plate Tectonics is a result of Convection Currents in the Mantle. The plates cracked and continents drifted apart from the single Pangaea
Plate boundary- region where two plates meet
Fault is a crack- often the crack is on a plate boundary
Divergent boundaries- pull apart- go in opposite ways which leave open areas for magma to fill in (this explains the sea floor spreading)
Convergent plate boundaries- push together- sometimes one over powers the other and one ends up going under the other ( this is subduction)
Often when we have subduction, we find a track or trail for magma to find it’s way toward the surface
Transform boundaries are when two plates try to pass each other by sliding past one another
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