Download Earthquake Text Worksheet

Science 7
Text Activity
On Earth Forces
Name ________________________________________________ Period ______ Date _____________
Forces in Earth’s Crust: ‘Inside Earth’ Text Activity pgs 44-50
Scan and preview text section.
Read in detail to answer questions.
1a. List & describe the three main types of stress in rock?
1b. How does tension change the shape of Earth’s crust?
1c. How does compression change the shape of Earth’s crust?
2a. What is a fault?
2b. What is a hanging wall and what is a footwall?
2c. Copy and label a diagram for a ‘normal fault’ from page 46.
2d. Copy and label a diagram for a ‘reverse fault’ from page 47.
2e. Copy and label a diagram for a ‘strike slip fault’ from page 47.
3a. What is an anticline?
3b. What is a syncline?
3c. What type of plate movement causes anticlines and synclines to form?
3d. What type of plate movement causes ‘fault-block’ mountains to form?
Science 7
Text Activity
On Earth Forces
Name ________________________________________________ Period ______ Date _____________
Earthquakes & Seismic Waves: ‘Inside Earth’ Text Activity pgs 51-56
Scan and preview text section
Read in detail to answer questions.
1a1. Copy Figure 7 (page 52) to show the ‘focus’ and ‘epicenter’ for an earthquake.
1a2. How does energy from an earthquake reach Earth’s surface?
1b1. What kind of movement is produced by seismic P-waves?
1b2. What kind of movement is produced by seismic S-waves?
1b3. What kind of movement is produced by seismic Surface waves?
1c. When do P waves arrive at the surface in relation to S waves and surface waves?
2a. What is an earthquakes ‘magnitude’?
2b. What does the Mercalli Scale measure for earthquakes?
3b. What does the Richter Scale measure for earthquakes?
3c. What does the Moment Magnitude Scale measure for earthquakes?
Science 7
Text Activity
On Earth Forces
Name ________________________________________________ Period ______ Date _____________
Earthquakes & Seismic Waves: ‘Inside Earth’ Text Activity pgs 60-65
Scan and preview text section
Read in detail to answer questions.
1a1. What is a seismograph?
1a2. What is a seismogram?
1b. How does a seismograph record seismic waves?
1c. How would the seismogram of a strong earthquake compare with a seismogram of a weak
earthquake?
2a. What are four instruments used to monitor faults?
2b. What changes does each instrument measure?
3a. What are three ways in which geologists use seismographic data?
3b1. Define or describe the meaning of ‘friction.’
3b2. Why do geologists collect data on friction along the sides of faults?
3c. Why is it difficult to predict earthquakes?