Heat

Scientists have studied the subject of heat as if their lives depended on it : Their lives – all lives – did depend on heat. The tremendous amount of heat from the 'Sun' – 17 million billion kilowatt – hours' worth everyday powered all the plants on Earth, their leaves – tiny solar panels – converting sun shine into biomass and physical movement through the process of 'Photosynthesis'. Plants, in turn sustained humans. The Sun was like the furnace of a gigantic steam engine, producing heat that powered the earth and everything on it. Heat energy is the life sustaining energy. We inhale oxygen, which is absorbed in the blood through the lungs. Oxygen is supplied to the cells through the blood stream. In the cells this oxygen combines with glucose to release CO2 , H2O and heat energy. This heat released is responsible for the functioning of human bodies. The same mechanism works more or less in all life forms.

For More Information on the topics of heat such as Change of State Heat Transfer Thermodynamics Heat Engines Refer to the link below wonderwhizkids.com/Physics/Heat