Waves Travel from a Source
Waves Travel from a Source is a Grade 4 science skill from Amplify Science (California), Chapter 1 on dolphin communication. Students learn that a wave begins when a force creates a disturbance in a material, and from that central source point, energy travels outward in a repeating pattern, spreading into the surrounding environment in all directions.
Key Concepts
A physical phenomenon begins with a disturbance. When a force disturbs a material, it creates a source of energy. This initial energy input becomes the starting point for a wave .
From this central point, the wave travels outward, spreading into the surrounding environment. This movement is not random; it forms a repeating, predictable pattern of motion that expands radially, much like ripples spreading across a surface.
Common Questions
Where do waves come from?
Waves originate at a source — a point where a force creates a disturbance in a material. That disturbance releases energy which travels outward in a repeating wave pattern.
How does a wave travel from its source?
From the source, the wave expands outward into the surrounding medium in all directions. Energy is passed from particle to particle, carrying the disturbance away from the origin.
What creates a wave in sound?
A sound wave is created by a vibrating object — the source. When a dolphin vocalizes, the vibration of its tissues disturbs the surrounding water, creating a sound wave that travels outward.
Where is this in Amplify Science Grade 4?
It is in Chapter 1: How does a mother dolphin communicate with her calf across a distance? in Amplify Science (California), Grade 4.