Semester 2 Exam Review Flashcards
What is seismology?
It is the study of earthquakes
What are seismic waves?
Waves of energy that travel through the earth
What is the epicenter and the focus?
The focus is the point inside the earth where the earthquake begins.
The epicenter is the point on earths surface directly above the epicenter.
What is the gap hypothesis?
Sections of active faults that have had relatively few earthquakes are likely to be the sites of strong earthquakes in future.
What are the richter and mercalli?
Richter scale measures magnitude.
Mercalli scale measures intensity.
What is magnitude and intensity?
Magnitude measures an earthquakes strength.
Intensity measures the amount of damage caused and the degree felt by people.
Why does Michigan have very few earthquakes while California has many?
California is very close to a fault line, while Michigan is very far away.
How does elastic deformation on a plate boundary or fault line cause an earthquake?
?
What are two kinds of volcanic eruptions? Which is more common?
Non-explosive eruptions- more common
Explosive eruptions
What are the three classifications of volcanoes? What do they mean?
Extinct- will never erupt
Dormant-currently not erupting but may erupt again
Active-currently erupting or showing signs of erupting in the near future
What are hot spots.
Volcanically active places far from plate boundaries
What are pyroclastic flows?
Enormous amounts of hot ash, gases, and dust from volcanoes
What two things help magma to form?
Heat and pressure
What magnetic pole is near which geographic pole?
South magnetic pole is near the north geographic pole
North magnetic pole is near the south geographic pole
Which pole do free floating magnets point?
North
What is the law of electric charges.
A law that states that like charges repel and opposite charges attract.
What are the parts of an atom? What are their charges?
Protons- positive
Neutrons- no charge
Electrons- negative
What was the war of the currents? Who was involved? What did they support? Who won?
The war of the currents was a “war” between Nicola Tessa and Thomas Edison. Tesla created AC or alternating current. Edison created DC or direct current. Tesla “won the war” and Edison “lost the war”. Edison then went on several smear campaigns.
What happens if you cut a magnet on half?
If you cut a magnet in half you would have two magnets, each with a north and South Pole.
What is influence?
One thing making something happen to another.
What is a wet cell?
Changes chemical energy into electrical energy. “Wet” refers to liquid electrolyte.
What is an electrolyte?
Chemicals that allow charges to flow. (Epsom salt solution)
What are electrodes?
Part of wet cell through which charges enter and exit. (Lead tabs)
What are test leads?
Wires with clips on ended that lead electricity from one place to another?
