1. March 31, 2014 Bell Work P-Wave and S-Wave Shadow Zones
In back of ISN
On Weekly Bell Work Sheet
Go to page 537
Title: Shadow Zones
Copy both pictures in Figure 19.11
Read the captions to find out why each shadow zone occurs
Write the reason next to each picture
Title: Shadow Zones
Explain why they occur:
P-waves get refracted and change direction as they move through the mantle and inner and outer core
S-waves disappear entirely when they reach the liquid outer core

2. April 1, 2014 Bell Work Richter vs. Mercalli Earthquake Scales
Richter Scale Bill Nye
In back of ISN
On Weekly Bell Work Sheet
Go to page 539and 540
Title: Richter vs. Mercalli Earthquake Scales
List I, II, V, IX, X,and XII from Table Modified Mercalli Scale
Read about and explain the difference between the Richter Scale and the Modified Mercalli Scale
Title: Richter vs. Mercalli Earthquake Scales
Define both terms:
Richter Scale
Mercalli Scale
Richter Scale
Mercalli Scale
The Richter scale was developed to assign a single number to quantify the. energy released by an earthquake.
The Mercalli Scale assigns a number to quantify the damage and effects of an earthquake.

3. April 2, 2014 Bell Work Locating the Epicenter
In back of ISN
On Weekly Bell Work Sheet
Go to page 542
Title: Locating the Epicenter
Copy Figure 19.17
Determine the name of the famous city along the San Andreas Fault where all 3 circles intersect
Title: Locating the Epicenter
Read the last paragraph on page Write a sentence explaining how many seismograph readings are needed to determine the epicenter of an earthquake

4. April 3, 2014 Bell Work In back of ISN On Weekly Bell Work Sheet
Go to page 548
Title: When a Tsunami Reaches Shallow Water
Copy figure 19.23
Read page 548 and explain what happens when a tsunami reaches shallow water
Title: When a Tsunami Reaches Shallow Water
Write 2 sentences explaining how a tsunami begins and what happens when it reaches a shallow area near the shore