In this unit we will learn that : Energy is a vital element in the existence of all natural phenomena , including life itself . Energy is essential for the functioning of devices . There are different types of energy – kinetic , radiation , heat , chemical , and more . There are various sources of energy . Energy may be transformed from one form to another . Energy may be transferred from one body to another . Concepts : Types of energy : kinetic energy , radiation energy , thermal energy , electrical energy , chemical energy , potential energy , elastic energy , nuclear energy Energy changes Energy transfer  אל הספר
מטח : המרכז לטכנולוגיה חינוכית