Demonstrate the change in direction of an object's motion using a machine or by interpreting diagrams or descriptions. Describe the effect of friction on an object by using different surfaces on an inclined plane or by interpreting diagrams or descriptions. Energy is a property of many substances and is associated with heat, light, electricity, mechanical motion, sound, and the nature of a chemical. Identify sources of heat, light, sound, electrical and chemical energy, and mechanical motion. Recognize and identify heat, light, sound, electrical and chemical energy, and mechanical motion as forms of energy.
Energy is transferred in many ways .
Heat moves in predictable ways, flowing from warmer to cooler objects, until both reach the same temperature. Investigate the effects of temperature differences on the movement of water. Design an experiment that reduces the rate at which a substance melts. Observe and compare the melting time of a substance in an insulated container vs. an open container. Electrical circuits provide a means of transferring electrical energy when heat, light, sound, and chemical changes are produced.