Understanding the Mercalli Intensity Scale

The video explains the unpredictability of earthquakes and how scientists estimate ground shaking. It introduces the Mercalli Intensity Scale, which measures the effects of earthquakes on humans and structures, and compares it to the Richter Scale, which measures energy release. The video details the levels of the Mercalli Scale, describing the types of damage and shaking at each level. It concludes with advice on earthquake preparedness and understanding risks.

What factor makes James's home more susceptible to shaking during an earthquake compared to Jen's?

• The height of the building

• The loose sediment beneath his home

• The age of the house

• The type of building material used

Who developed the Mercalli Intensity Scale?

• Charles Richter

• Giuseppe Mercalli

• Isaac Newton

• Alfred Wegener

How does the Mercalli Intensity Scale differ from the Richter scale?

• It measures the energy released by an earthquake

• It describes the effects on humans and structures

• It is used to predict future earthquakes

• It is based on the depth of the earthquake

At which Mercalli level do people start to feel shaking similar to a big truck passing by?

• Level 5

• Level 2 and 3

• Level 4

• Level 1

What kind of damage is expected at Mercalli level 6?

• Landslides and broken pipes

• Hardly noticeable shaking

• Objects falling off shelves and windows cracking

• Severe damage to old brick buildings

Which level of the Mercalli Intensity Scale is associated with landslides and broken pipes?

• Level 7

• Level 9

• Level 10

• Level 8

What happens to homes at Mercalli level 8?

• They remain unaffected

• They shift on their foundations

• They collapse completely

• They experience light shaking

Which Mercalli level is associated with extreme shaking and widespread destruction?

• Level 10

• Level 9

• Level 7

• Level 8

What is a key purpose of the Mercalli Intensity Scale?

• To measure the energy released by an earthquake

• To help people understand their risks and prepare

• To predict the exact time of an earthquake

• To determine the depth of an earthquake

What should people do to prepare for potential earthquakes according to the video?

• Learn their risk and make a kit

• Rely solely on the Richter scale

• Wait for government instructions

• Ignore local resources