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Science
8th
grade
Avoiding Earthquake Surprises in the Pacific Northwest
10 questions
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- 1. Multiple Choice
Where is Cascadia located?
in Alaska
in Chile
in the Pacific Northwest
in the middle of the Pacific Ocean
- 2. Multiple Choice
What is the cause of earthquakes?
the sudden breaking of the earth’s rigid outer shell
the stretching and thinning of the rocks that make up a tectonic plate
the very slow movement of tectonic plates that are separating from each other
the energy released when two tectonic plates grind together and then suddenly move
- 3. Multiple Choice
What evidence led scientists to conclude that Cascadia had been hit by large earthquakes many times in the past?
the knowledge that the earth’s outer shell is made up of tectonic plates
the remains of forests in Cascadia that had died because of flooding
the fact that Alaska had been hit by an earthquake of magnitude 9.2
the revision of the Uniform Building Code in the Pacific Northwest
- 4. Multiple Choice
Based on the text, what may have led people to revise the Uniform Building Code in the Pacific Northwest?
the need to prevent large earthquakes from happening in the Pacific Northwest region
the fact that buildings in the Pacific Northwest had recently fallen down during earthquakes
the desire to help scientists learn about buildings in areas that are likely to be hit by earthquakes
the evidence that large earthquakes had struck the Pacific Northwest in the past
- 5. Multiple Choice
What is the main idea of this article?
Scientists can tell where large earthquakes have occurred by studying dead forests along coastal land.
Earthquakes can occur along subduction zones, where an oceanic tectonic plate sinks below a continental plate
Scientists have found evidence that the Pacific Northwest is at risk of being hit by major earthquakes.
Changing the Uniform Building Code in the Pacific Northwest was an important step toward meeting the threat of large earthquakes.
- 6. Multiple Choice
Read these sentences from the text.
“Earthquakes can’t be prevented. However, people can take measures to minimize the damage they cause. In some cases, communities can strengthen existing dams, bridges, water systems, schools, hospitals, and lifelines (electrical, gas, and water lines). They can also design and build earthquake-resistant structures.”
What does the word “measures” most nearly mean in this sentence?
questions
amounts
actions
lessons
- 7. Multiple Choice
Choose the answer that best completes the second sentence below.
Scientists used to think that Cascadia would only be struck by earthquakes of magnitude 7 or below. ______, they found more recent evidence of bigger earthquakes in the region.
Therefore
However
Indeed
For example
- 8. Multiple Choice
How much more energy will a magnitude 8 earthquake release when compared to a magnitude 7?
10 times
30 times
3 times
100 times
- 9. Multiple Choice
During the 2 great quakes in the 1900s; how far forward did the continents move?
20 meters
2 meters
10 meters
30 meters
- 10. Multiple Choice
Which type of crust is more dense, causing it to sink?
Oceanic Crust
Continental Crust
Both Sink
Neither will sink
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