Encourage the student to provide reason and hypotheses for what is happening, leading into a discussion of energy transfer. Accept all plausible explanations, and encourage the student to record as many observations as possible. Styrofoam cup, paper cup, tin can, glass beaker, and plastic cup, and then place each container in hot tapwater. Hypothesize, observe, and record which ice cube melts first, second, third, and fourth. Sound An understanding of the properties of sound is important in making connections tocommunication, technology, and health.
Students discover the properties of sound throughexploration and experimentation.
They explore how sounds change and travel by experimentingwith a variety of objects such as tuning forks, bottles, rubber bands, and cup telephones. As aresult of these experiences, students begin to understand how humans hear sounds and howsounds are made. Activities Listen to and describe a variety of sounds, then try to identify their pitch, quality, and intensity. Use tuning forks to explore the vibrations that make sounds. Explore how sound changes as it travels through various materials.