1. Learning Target 4.1 – Understand that waves carry energy (not matter) from place to place.
Unit 4 - Waves

2. What is a Wave?
A wave can be described as a disturbance that travels through a medium & carries energy from one place to another. 
Waves carry energy, momentum, and/or information (not matter) from one location to another.
The “medium” is the substance (or field) through which the disturbance is transmitted.
Some examples of mediums….
For Mechanical waves the medium is matter.
For Electromagnetic waves the medium is electric & magnetic fields.
For Gravitational waves he medium is a gravitational field.