Quaking Earth, Racing Waves

1. On page 206 the passage states that the Sunda Megathrust Fault was storing energy that would result in a massive undersea earthquake. What does massive mean?

• lengthy
• heavy
• tough
• large

2. What did Sieh and the other scientists learn after examining samples of coral? (page 207)

• Coral can grow tall enough to wipe out an entire village.
• Islands on top of a continental plate were rising each year.
• Major earthquakes occurred about every 200 years.
• Some tsunamis can be up to 100 feet tall.

3. What evidence on page 208 supports the fact that Tello Island was sinking? (mark all that apply)

• Wells were full of salty seawater.
• Boardwalks and harbors sinking.
• Trees that once grew on land were now underwater.
• People started building their houses out of lightweight wood.
• Many islanders had moved away from the shore.

4. According to the passage, what is the relationship between underwater earthquakes and tsunamis? (page 210)

• Tsunamis cause underwater earthquakes.
• Tsunamis form as a result of underwater earthquakes.
• The size of tsunamis determines the severity of underwater earthquakes.
• The season will affect whether a tsunami will develop after an underwater earthquake.

5. Why do Sieh and his colleagues recommend that people on the island use bamboo to build their homes? (page 214)

• Bamboo is lightweight and will cause less damage than heavy concrete if toppled in an earthquake.
• Bamboo is an expensive material, which means it is a good quality building material.
• Bamboo is traditionally used to build villages, and this tradition should continue.
• Bamboo is flexible and easy to harvest.

6. What text feature is this on page 207?

• diagram
• sidebar
• heading
• graphic
• caption

7. What text feature is this on page 211?

• sidebar
• heading
• title
• caption
• map

8. Where was this graphic taken? (page 208)

• At a school on the island of Hawaii.
• On the island of Mosques.
• On an island in Indonesia.
• On the island of village square.

9. What is the name of the text feature circled in red?

• graphic
• caption
• diagram
• map
• heading

10. How does the author explain how slowly Earth's plates move? (page 209)

• A few inches a year.
• A few centimeters a year.
• A few meters a year.
• A few fingernails a year.