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Apologia Test #6
APologia module 6 test
Question | Answer |
---|---|
Define Sedimentary Rock | Rock formed when heat,pressure and chemical reactions cement sediments together. |
Define Plastic Rock | Rock that behaves like a liquid and a solid. |
Define Fault | The boundry between a section of moving rock and a section of stationary rock. |
Define Epicenter | The point on the surface of the earth directly above an earthquakes's focus. |
WHat have Scientists observed in order to learn about earth's interior? | seismic waves |
What causes the earth's magnetic field? | electrical flow in the core. |
What two theories attempt to explain the earth's magnetic field? Which theory is the most scientifically valid? | the dynamo theory and the rapid decay theory. The rapid decay theory is more is more scientifically valid |
What benefit do we derive from the earth's magnetic field? | it blocks cosmic rays from the sun |
In a survey of the deep ocean, sonar measurments detect a deep trench on the bottom that runs as far as the instruments detect. What is the most likely cause of the trench? | the trenc his probably the site where one plate slides under another |
The earthquake activity of two regions on earth is measured. The first region sits near the middle of one of the plates in the earth's crust, while the other is very near a boundary between two plates. Which will have the greatest earthquake activity? | the region nearest the plate boundary. |
If a region of the earth has a lot of volcanic activity, what kinds of mountains do you expect to find there? | you will find volcanic mountains and domed mountains. |
If a region of the earth is on the boundary between two plates, what kind of mountains do you expect to find there? | fault block mountains. |