Observe the activity in your classroom. You can observe people, objects in the room, parts of your actual classroom, to begin noticing changes in matter. Collect data for two examples of changes in matter. Use the Changes in Matter to determine if your examples are physical or chemical changes. Your answer should include a description of each food preparation, as well as evidence for which type of change it is. You can use this format:
Microphones are a type of transducer - a device which converts energy from one form to another. Microphones convert acoustical energy into electrical energy. Different types of microphone have different ways of converting energy.
