Section 1 The Nature of Waves Chapter 10 Waves Section 1 The Nature of Waves

What is a wave? A repeating disturbance or movement that transfers energy through matter OR space

Examples of Waves Ocean Waves Earthquakes Light

Waves and Energy Waves are caused by a transfer of energy

Waves and Energy Example Pebble falling into a still pool of water. Pebble transfers energy water molecules other water molecules

Waves and Matter Waves can carry energy without transporting matter from place to place. Example: Boat passing another boat on the river.

Waves Only travel as long as they have energy * Produced by vibrations

Mechanical Waves Travel only through a medium Medium- matter a wave travels through Examples: Solid, liquid, gas, or a combo of them

Types of Mechanical Waves Transverse Waves Matter in medium moves back and forth @ right angles to wave’s direction. Examples: Ocean Waves You shaking a rope

Types of Mechanical Waves 2. Compressional Waves Matter in medium moves along same direction wave travels. Example: Squeezing and releasing the coils in a spring.

Types of Mechanical Waves Compressional Waves are also called Longitudinal Waves

Sound Waves Compressional Wave Air molecules compressed when object produces vibration.

Water Waves Not purely transverse Some water moves up and down BUT some water moves back and forth.

Water Waves Produced by wind Size of wave depends on: 1. Speed of wind 2. Distance wind blows 3. How long wind blows

Seismic Waves Combo of transverse and compressional waves Caused by Earth’s crust breaking Produces vibrations  creates seismic waves