Question

Lesson Labs​Quick Labs​
Modeling Strike-Slip Faults
Earthquake Vibrations
Elastic Rebound
​Engage Your Brain​
Predict Fill in any words or numbers that you
think best complete each of the statements
below.
​Each year there are approximately
earthquakes detected around the world.​​In the United States, the state with the most
earthquakes on average is ​​Every year, earthquakes cause of
dollars in damages in the United States.​​Most earthquakes only last for several
of time.​
Analyze Using the image, list in column 1
some of the hazards that can occur after an
earthquake. In column 2, explain why you think
these items or situations would be hazardous.
A fire and damaged road after an earthquake.
Hazards Why?
​Active Reading​
Synthesize You can often define an unknown
word if you know the meaning of its word parts.
Use the word parts and sentence below to make
an educated guess about the meaning of the
word epicenter.
A table showing word parts and meaning.
Word part Meaning
epi- on, upon, or over
-center the middle
​Example sentence​​The epicenter of the earthquake was only 3 km
from our school.​​epicenter:

Answer 1

Predict — Fill-ins
- Each year there are approximately 500,000 earthquakes detected around the world.
- In the United States, the state with the most earthquakes on average is Alaska.
- Every year, earthquakes cause billions of dollars in damages in the United States.
- Most earthquakes only last for several seconds to a few minutes.

Analyze — Hazards after an earthquake (column 1) and why they are hazardous (column 2)
- Fire — Broken gas lines, electrical shorts, and overturned stoves can ignite structures and spread quickly when roads and water supplies for firefighting are damaged.
- Damaged roads and bridges — Prevent emergency vehicles from reaching people, interrupt evacuation routes, and delay repairs and supply delivery.
- Building collapse — Causes injury and death, traps people under rubble, and makes areas unsafe for rescue and recovery.
- Tsunami (if undersea quake) — Large ocean waves can flood and destroy coastal communities, causing drowning and property loss.
- Landslides — Shaking can trigger slopes to fail, burying roads and homes and cutting off communities.
- Gas leaks and chemical spills — Can cause fires, explosions, or hazardous contamination of air and water.
- Power outages — Stop critical services (hospitals, water treatment, communications) and complicate rescue and recovery.
- Contaminated water supplies — Broken pipes and sewage leaks can spread disease and make water unsafe to drink.
- Aftershocks — Smaller quakes that can further damage already weakened structures and endanger rescuers.

Active Reading — Meaning of epicenter
- epi- = on, upon, over; center = the middle.
- Epicenter: the point on Earth’s surface directly above the earthquake’s focus (hypocenter) — the location on the surface that is usually closest to where the quake started.