Elephants on the coast of Thailand are acting strange. They stamp their feet and motion toward the hulls. The sea draws back from the beaches. Fish flop in the mud. Suddenly, a huge wave appears. This is no ordinary wave. It is a tsunamiTsunami (pronounced "soo-nah-mee") waves are larger and faster than normal surface waves. A tsunami wave can travel as fast as a jet plane and can be as tall as a ten-story building. Imagine dropping a stone into a pond. The water on the surface ripples. A tsunami is like a very powerful ripple. Tsumais begin when the ocean rises or falls very suddenly. Large amounts of seawater are displaced. This movement causes huge waves.For a tsunami to occur, there must be some kind of force that causes the ocean water to become displaced. Most trunamis are caused by underwater earthquakes. however,volcanoes, landslides, large,icebergs, and even meteorites are capable of causing one of these mighty waves.Trunamis are extremely powerful. Ordinary waves lose power when they break. Tsunami waves can remain powerful for several days. Because tsunami waves are so strong, they can kill people, damage property , and completely ruin an ecosystem in just one hour.Scientist have no way of predicting when a tsunami will hit. However, if a powerful enough earthquake occurs,scientists can issue a warning or a watch. A warning means that a tsunami will very likely hit soon. A watch means that conditions are favorable for a tsunami. When people are notified about a watch or a warning, they have more time to prepare. It is best not to get caught unaware when a tsunami is on the way.
In paragraph, the elephants are most likely acting strange because they
Today, Mike and his mom are going to the library. Mike wants to find a book to read. His Mom wants to use a computer there. When they get ot the library. Mike finds a book about detectives. He also finds a book with chapters about a friendly ghost. Finally, he finds a book about a man who lives in the woods without food or water.He puts the books on the front desk and waits for his mom.Mike's mom sit at one of the computers in the library. She checks er email and looks at pictures of flowers on the internet. Then she reads a news article on a website. Mike's mom leaves the computer and walks over to Mike, holding up something out for him. Mike looks at her quizzically, It takes him a moment to recognize w that movie for us to watch tonight, " says Mike's mom"Sure,"Mike says, now holding the movie out in front of him. He reads the cover while walking back to the library entrance. He puts his books and the movie on the front desk to check out.A librarian stands behind the counter holding an electronic scanner. "How long can we keep them?"Mike asks her."Three weeks, "says the librarian."Cool,"says Mike.Suddenly, Mike is surprised. His mother is checking out something else that is too big to put on the desk. It's a picture of the ocean."What is that for?"Mike asks."To put on our wall at home, "says Mike's mom.:You can do that?"Mike asks.Mike's mom smiles at the librarian. "Yes, "she says, " but we have to return it in three months."According to the passage, how long can Mike and his mother use the books and the movie before they must return them to the library?