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 engaging 250-word science passage introduces Grade 4-5 students to circular wave patterns and how they behave in nature. Students learn how circular waves spread outward in rings from a central point, using the familiar example of dropping a pebble into still water. The passage explains why these waves get weaker as they travel farther, connecting the concept to energy distribution over larger areas. Aligned with NGSS 4-PS4-1 (Develop a model of waves to describe patterns in terms of amplitude and wavelength), this audio-integrated reading passage includes concrete examples like pond ripples, raindrops, and stadium waves. The content features age-appropriate vocabulary with terms like ripples, energy, and circular waves naturally defined within the text. Students explore cause-and-effect relationships between wave spreading and energy distribution. The passage includes a simplified differentiated version for diverse learners, Spanish translations, an illustrated glossary, comprehension quiz, writing activities, and graphic organizers. All activities encourage scientific thinking and real-world connections. The audio integration supports multiple learning styles and helps develop reading fluency while building science content knowledge about wave behavior and patterns.
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A wave is a disturbance that carries energy from one place to another. When a wave starts from a single point, it spreads out in a special pattern. This happens because the energy moves outward in all directions at the same time.
When you drop a stone into calm water, you create a point source—a single spot where the wave begins. The energy from the splash pushes the water outward equally in every direction. This creates circular waves that look like rings spreading across the water's surface. Each circle is larger than the one before it because the wave keeps moving farther from where it started.
Think of it like blowing up a balloon. As you add air, the balloon gets bigger in all directions at once. Waves work the same way—they expand outward from the starting point in a growing circle.
The wave pattern shows us how energy travels through water. The first circle is small and close to where the stone hit. The next circle is bigger, and the one after that is even bigger. Scientists call these expanding circles concentric circles because they all share the same center point.
You can see circular wave patterns in many places. Raindrops hitting a puddle create tiny circular waves. A pebble dropped in a pond makes bigger ones. Even sound waves spread out in circles when someone claps their hands. Understanding circular wave patterns helps us learn how energy moves through different materials.
What does a wave carry?
Water from place to placeEnergy from place to placeStones across the pondAir in all directions
What is a point source?
A large area of waterA single spot where waves beginThe edge of a waveA type of circular pattern