This Self-Learning Module (SLM) is prepared so that you, our dear learners, can continue your studies and learn while at home. Activities, questions, directions, exercises, and discussions are carefully stated for you to understand each lesson.
Each SLM is composed of different parts. Each part shall guide you step-by-step as you discover and understand the lesson prepared for you.
Pre-tests are provided to measure your prior knowledge on lessons in each SLM. This will tell you if you need to proceed on completing this module or if you need to ask your facilitator or your teacher’s assistance for better understanding of the lesson. At the end of each module, you need to answer the post-test to self-check your learning. Answer keys are provided for each activity and test. We trust that you will be honest in using these.
Please use this module with care. Do not put unnecessary marks on any part of this SLM. Use a separate sheet of paper in answering the exercises and tests. And read the instructions carefully before performing each task.
Light, sound and heat are essential part of our lives. Light allows us to see objects, shapes, and colors. Sound is the main form of communications for us humans. Without sound, we would not hear and therefore would not be able to speak. Sounds are also used by animals for communication. On the other hand, heat is needed for our activities like cooking, drying the washed clothes, and warming our bodies during cold weather.
In this module, you will be informed of how light, sound and heat travel in different media. You will be provided with activities which will help you develop the concepts you have to learn.
The lesson focuses on:
- Lesson 1- How Light Travels
- Lesson 2- How Sound Travels
- Lesson 3- How Heat Travels
After going through this module, you are expected to be able to:
1. describe how light travels;
2. describe how sound travels in solid, liquid and gas materials; and
3. describe how heat travels in solid materials, through liquid materials and air.