Earthquakes Lesson 4

Earthquakes Lesson 4

pp.18-23

Multiple Choice

Which word means the amount of energy an earthquake releases?

• seismograph

• magnitude

• Richter Scale

• registers

• immmense

Multiple Select

How do scientists measure and compare earthquakes?

• Seismographs

• Seismographic stations

• Richter Scale

• Mercalli Intensity Scale

Multiple Choice

What does the text say about seismographs?

• It measures the magnitude, amount of energy, an earthquake releases and gives it a number.

• It uses observations of the earthquake damage to rate it.

• It records data that arrival of earthquake waves, their magnitude, and location.

Multiple Choice

What does the text say on page 20 about the Richter Scale?

• It measures the magnitude, amount of energy, an earthquake releases and gives it a number.

• It uses observations of the earthquake damage to rate it.

• It records data that arrival of earthquake waves, their magnitude, and location.

Multiple Choice

What does page 23 say about the Mercalli Intensity Scale?

• It measures the magnitude, amount of energy, an earthquake releases and gives it a number.

• It uses observations of the earthquake damage to rate it.

• It records data that arrival of earthquake waves, their magnitude, and location.

Multiple Choice

How could you summarize the difference between the seismograph and the two scales?

• The seismograph records data about the arrival, size and location of earthquakes, but the two scales assign numbers to earthquakes to compare size and damage to other earthquakes.

• The two scales record data about the arrival, size and location of earthquakes, but the seismograph assigns numbers to earthquakes to compare size and damage to other earthquakes.

Open Ended

During the October 1989 earthquake in San Fransico, why was the damage greater in the Marina district than in other parts of the city? Cite evidence from the text to support your answer.

Reflection writing (get your journals out and start reflecting on these questions)

• Were you successful today? Did you meet the success criteria? If so, how?

• What did you learn about how scientist measure earthquakes? Include words such as seismographs, magnitude, Richter scale, and Mercalli Intensity Scale.