Science In class study test

1.      The Richter scale is a scale of 1-10 to measure the ground shake and is not that accurate. MMS is a scale that measures the magnitude of the waves

-          Each unit of the Richter scale represents is 10x and MMS is .5x

-          The both measure a result of an earthquake

-          Richter scale was used for California bedrock

2.      California, Oregon and Washington are prone to earthquakes because they are very close to fault and fault zones

-          Right on the edge of the N American plate

-          The ring of fire

-          WA, set above a subduction zone

3.      Alfred Wegener’s clue that lead to his theory was that all the continent’s fit together like a puzzle, he found mountain ranges that have been split in half and found across the world, and he also found plants in different regions. He was lacking time and date. If he had infinite time he could see the continents move each centimeter and he also did not have the under water map.

-          He found fossils of things that didn’t live there

-          He didn’t know the cause of the movement

4.      Idk

-          Once they started investigating sea floor they found evidence of movement – seafloor spreading

-          A map of all the earthquakes and volcanoes

5.      3 types of plate boundaries are transformed, convergent, divergent

6.      Compression, tension, shear

-          Compression: convergent (mountain ranges form when 2 continents collide)

-          Tension: divergent (continental rift valley, mid oceanic rift valley)

-          Shear: transform (San Andrea’s fault)

7.      Igneous melts to lava or magma then cools and crystalize to become sedimentary  then uplift to weathering then after that its erosion deposition compaction cementation then its metamorphic to extreme pressure or heat back to sedimentary.

-          The one to have fossils are probably sedimentary, laying down overtime

8.      Mantle is having a convection current that drives the motion

-          Ridge push, basal drag, slab pull

9.      Isostasy is the gravitational equilibrium of the crust and the mantal, subsidence is something goes down deeper into the earth and uplift is the mountain going upwards from ridge push??

-          Subsidence is when the crust is pushing down into the mantle and uplifting

10. Starin is when there is a change in the shape of rocks caused by stress

-          Plastic: stress applied but does not go back to its original shape

-          Elastic: stress applied but does go back to its original shape