Levelled Books

  • Smithsonian Readers 4: The Science of Waves and Surfboards

    Smithsonian Readers 4: The Science of Waves and Surfboards

    Being a great surfer requires more than skill and instinct. It's a sport that relies on science! Without buoyancy, surfers would sink. Without acceleration, they could not travel the length of a wave. Science also plays a role in how surfboards are...

  • Smithsonian Readers 4: Tracking a Storm

    Smithsonian Readers 4: Tracking a Storm

    Modern meteorologists put science to work to predict what the future holds. These predictions tell people how to dress for the day, or whether to pack an umbrella. But that's not all they do! They also track hurricanes, tornadoes, and major storms. They...

  • Smithsonian Readers 5: Color-Changing Cephalopods

    Smithsonian Readers 5: Color-Changing Cephalopods

    Imagine changing the color of your skin or even your shape in an instant. If you were a cephalopod, you wouldn't have to imagine it--you could to it! Scientists are closely studying them to learn how to mimic their amazing changeability." Just don't...

  • Smithsonian Readers 5: Designing National Parks

    Smithsonian Readers 5: Designing National Parks

    Visitors from across the country and around the world flock to U.S. national parks to explore their beauty. Little do they know that the National Park Service (NPS) has been guiding and enhancing their experience for more than 100 years. The NPS's...

  • Smithsonian Readers 5: Digging Up Dinosaurs

    Smithsonian Readers 5: Digging Up Dinosaurs

    Many people go to museums to see dinosaur fossils. But visitors would never get to see these displays without the work of paleontologists. They locate fossils, dig them up, and send them to a lab to be cleaned and preserved. Museum curators decide how to...

  • Smithsonian Readers 5: Guided by Stars

    Smithsonian Readers 5: Guided by Stars

    Ancient Polynesians were some of the best navigators in history. They sailed double-hulled outrigger canoes across great distances and settled in all the major islands in the Pacific Ocean hundreds of years before Europeans arrived. Learn how they did...

  • Smithsonian Readers 5: Inka Terraces

    Smithsonian Readers 5: Inka Terraces

    The Inka were master farmers, builders, and planners who lived in the Andes Mountains. This challenging environment required the Inka to develop innovative engineering solutions in order to farm, live, and thrive. Today, people still marvel at the...

  • Smithsonian Readers 5: Life in a Cube

    Smithsonian Readers 5: Life in a Cube

    How much life can fit in one cubic foot? Photographer David Liittschwager and zoologist Chris Meyer learned the answer is: quite a lot! Learn how studying life in just one cubic foot can teach us about life on the entire planet. Created in collaboration...

  • Smithsonian Readers 5: Living and Working in Space

    Smithsonian Readers 5: Living and Working in Space

    What is it like to eat, sleep, and work in space? Find out as you read about life in a space station orbiting above Earth! Discover how astronauts function in a challenging environment that includes weightlessness, cramped quarters, and zero privacy...

  • Smithsonian Readers 5: Making Music with Magnets

    Smithsonian Readers 5: Making Music with Magnets

    Magnets are the sparks that bring electric guitars to life! Learn how the guitar has changed over time and how it has impacted music. You'll also learn how electromagnets work and what they're made of. Follow the current to learn more about the world of...

  • Smithsonian Readers 5: Plant Invaders

    Smithsonian Readers 5: Plant Invaders

    Little green aliens have invaded the planet! No, not space invaders from Mars. These are plant invaders. Sure, they look harmless. But invasive species can wreak havoc on ecosystems. Learn how people are working to slow the invasion and restore...

  • Smithsonian Readers 5: Saving a Species

    Smithsonian Readers 5: Saving a Species

    People at Smithsonian's National Zoo and Conservation Biology Institute are working hard to save animal species from extinction. Meet five animals they have saved and learn about the people on a mission to save them. Created in collaboration with the...