This resource focuses on the properties and behavior of light as an electromagnetic wave. The goal is to define what light is and explore how it interacts with different types of matter, such as air, water, and solid surfaces. The document includes observational prompts designed to encourage critical thinking—participants are tasked with noticing and hypothesizing about the movement and behavior of light in various scenarios. Activities such as drawing a wave model of light allow for a visual representation of how light travels through space and interacts with obstacles. Furthermore, the document explores specific phenomena when light travels through a vacuum versus when it encounters material, highlighting concepts like reflection, transmission, and absorption.