Earthquakes

1. What inferences can you make about earthquakes based on this text?

• It is pretty easy to tell when an earthquake is going to occur.

• All earthquakes cause tsunamis

• Foreshocks are larger than mainshocks

• There will likely be earthquakes in the future

1. Which quote best supports the statement that earthquakes will likely happen in the future?

• "Scientists can tell where an earthquake took place by looking at the energy waves."

• "However, it is more difficult to know exactly when one will occur."

• "Scientists know where earthquakes will probably happen at some point in the future."

• "An earthquake is what happens when two blocks of the earth suddenly slip past one another."

Which of the following statements is true about S and P waves during earthquakes?

• The P wave is faster than the S wave. The S wave squeezes and stretches the earth, while the P wave shakes it up and down.

• The S wave is faster than the P wave. The P wave squeezes and stretches the earth, while the S wave shakes it up and down.

• The P wave is faster than the S wave. The P wave squeezes and stretches the earth, while the S wave shakes it up and down.

• None of these is true

1. Which quote supports the central idea that the movement from earthquakes is caused by energy waves?

• "Eventually the edges come unstuck along one of the faults. That's when an earthquake happens."

• "An earthquake is what happens when two blocks of the earth suddenly slip past one another."

• "To measure an earthquake, scientists use seismogram recordings. They can tell scientists the time, place and size of an earthquake."

• "When the waves reach the earth's surface, they shake the ground and everything on it."

Which change if any is needed to the following sentence: In the article The science of earthquakes the author tells the reader about what causes earthquakes.

• In the article "The science of earthquakes" the author tells the reader about what causes earthquakes.

• In the article, "The science of earthquakes," the author tells the reader about what causes earthquakes.

• In the article, The science of earthquakes, the author tells the reader about what causes earthquakes.

• No change