March 31, 2014 Bell Work P-Wave and S-Wave Shadow Zones

In back of ISN On Weekly Bell Work Sheet1. Title: Shadow Zones2. 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

1. Go to page 5372. Title: Shadow Zones3. Copy both pictures in Figure 19.114. Read the captions to find out why

each shadow zone occurs5. Write the reason next to each

picture

April 1, 2014 Bell Work Richter vs. Mercalli Earthquake Scales

In back of ISN On Weekly Bell Work Sheet1. Title: Richter vs. Mercalli

Earthquake Scales2. Define both terms:• Richter Scale• Mercalli Scale

1. Go to page 539and 5402. Title: Richter vs. Mercalli

Earthquake Scales3. List I, II, V, IX, X,and XII from Table

19.2 Modified Mercalli Scale4. Read about and explain the

difference between the Richter Scale and the Modified Mercalli Scale

Richter Scale Mercalli ScaleThe 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.

Richter Scale Bill Nye

April 2, 2014 Bell Work Locating the Epicenter

In back of ISN On Weekly Bell Work Sheet1. Title: Locating the Epicenter2. Read the last paragraph on

page 542. Write a sentence explaining how many seismograph readings are needed to determine the epicenter of an earthquake

1. Go to page 5422. Title: Locating the Epicenter3. Copy Figure 19.174. Determine the name of the

famous city along the San Andreas Fault where all 3 circles intersect

April 3, 2014 Bell Work

In back of ISN On Weekly Bell Work Sheet1. Title: When a Tsunami

Reaches Shallow Water2. Write 2 sentences

explaining how a tsunami begins and what happens when it reaches a shallow area near the shore

1. Go to page 5482. Title: When a Tsunami Reaches

Shallow Water3. Copy figure 19.234. Read page 548 and explain

what happens when a tsunami reaches shallow water