Rocks and Natural Disasters — Reading Comprehension
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This learning resource is available in interactive and printable formats. The interactive worksheet can be played online and assigned to students. The Printable PDF version can be downloaded and printed for completion by hand.
This passage, 'Floods and Volcanoes Leave Rock Clues,' is designed for grade 4-5 students and aligns with NGSS science standards. It explores how floods and volcanoes change Earth's surface by moving and creating rocks. Students will learn key terms such as erosion, sediment, and igneous rock, and discover real-world examples of how landforms are shaped. The passage is audio-integrated, making it accessible for different learners. Activities include a multiple-choice quiz and writing prompts to encourage critical thinking, cause-and-effect analysis, and connections to everyday life. The passage and glossary support vocabulary development, while the Spanish translation ensures accessibility. Keywords such as floods, volcanoes, rocks, erosion, and NGSS make this resource ideal for classroom or home learning focused on earth science.
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Goat Rocks age eruptive deposits are shown and Floating Island lava flow. Rick Hoblitt Wikimedia Commons
Earth is always changing, and some of these changes happen because of floods and volcanoes. These natural events may seem destructive, but they also leave behind important clues in rocks.
A flood happens when water covers land that is usually dry, often because of heavy rain or melting snow. Floods can move large amounts of soil, sand, and rocks from one place to another. This process is called erosion. As water flows quickly, it picks up pieces of rock and carries them downstream. When the water slows down, it drops these materials. The dropped pieces are called sediment. Over time, layers of sediment can build up and form new types of rocks, called sedimentary rocks. Scientists can study these layers to learn about floods that happened long ago.
Volcanoes are mountains that can erupt, sending out lava, ash, and gases. When lava cools and hardens, it forms rocks called igneous rocks. These rocks often look different from sedimentary rocks because they are made from melted rock. Some volcanoes erupt quickly, and others erupt slowly, but both leave behind rock clues that scientists can study. For example, the black rocks found in Hawaii were formed by cooled lava from volcanoes.
By looking at the kinds of rocks in an area, scientists can figure out if there were floods or volcanoes there in the past. They use these rock clues to understand how Earth’s surface has changed over time.
Interesting Fact: The fossils of plants and animals are sometimes trapped inside sedimentary rocks, helping scientists learn about life from millions of years ago!
What forms when lava cools?
Igneous rocksSedimentSand dunesFossils
What does erosion do?
Moves rocks and soilCools lavaBuilds volcanoesCreates fossils
What is sediment made of?
Small pieces of rockHot lavaCloudsTree roots
How do scientists learn about old floods?
By studying rock layersWatching volcanoes eruptMeasuring wind speedLooking at tree leaves
Why are fossils important in rocks?
Show past lifeCool lava fasterMake rocks heavierCause erosion
If a volcano erupts, what forms?
Igneous rock formsFlood happensSediment washes awayPlants grow quickly
Floods never move rocks. True or false?
TrueFalse
What is 'erosion'?
Moving rocks and soilMelting iceGrowing plantsCooling lava
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