Volcanoes
What is the relationship between the silica content of magma and the explosiveness of a volcanic
eruption?
Ex. Dissolved gas content High or Low to be explosive?
Ex. A watered down magma means a violent or quiet eruption?
Ex. Increased Temp and Pressure gives a quiet or violent eruption?
Be able to differentiate between Shield, Composite, and Cinder Cone Volcanoes.
Places where most volcanoes occur?
If the top of a volcano collapses, it may form a large opening called a?
Explain 2 kinds of ways volcanoes can form.
Be able to differentiate between extinct, dormant and Active volcanoes.
Earthquakes
1. What does a Travel Time Graph Measure?
2. Know how to determine the distance between
the arrival times of the first P waves and S
waves.
3. Why does the distance and time increase as
seismic waves move away from the epicenter?
4. If the S wave took 17 minutes and 20 seconds to
arrive at the seismograph station, how far was
it away?
5. If the P wave was 4 minutes and 40 seconds
away from the seismograph station how far was
it from the seismograph?
6. If there is 9 minutes and 40 seconds between
the first P waves and first S wave what would
the distance from the epicenter be?
7. If the distance between the first P wave and
first S wave is 5 minutes and 20 seconds what
would the distance from the epicenter be?
What are 3 ways seismologist use to determine impending/forthcoming earthqukes?
What machine is responsible for the below image?
Be able to identify P(Primary) waves, S(Shear/Secondary) waves and Surface (L waves) if given the
above.
Be able to identify what materials P waves travel through and S waves
How could the Richter scale use this seismograph reading to determine the intensity of the earthquake?
How does the Modified Mercalli scale differ from the Richter Scale?
Look at the illustration to the left.
1. Be able to identify the locations of the
epicenter, focus and fault.
2. How many seismograph stations are
needed to find the epicenter of an
earthquake?
Why do earthquakes and volcanoes occur in similar parts of the world?