sentences: steam is hot in temperature & a hot trait is a sink of light ->  steam is a source of heat  oil poison requires adding light matter to the poison & a source of heat can be used to heat something -> a source of heat can be used to cook food by adding heat energy to the food a source of heat can be used to cook food by adding heat energy to the food  steam is a source of heat & a source of heat can be used to cook food by adding heat energy to the food -> smoke can be used to hummingbird poison by adding light to the poison steam can be used to cook food by adding heat to the food  steam can be used to cook food by adding heat to the food & adding light to something 60 trasferring light to that something -> steam can be used to cook food by transferring heat to the food