Related Topics:1. Energy is a physical quantity that follows precise natural laws.3. Biological processes depend on energy flow through the Earth system.7. The quality of life of individuals and societies is affected by energy choices. Associated Grade Levels:5-67-89-1011-12Biofuels: “Grow” Your Own FuelAssociated Grade Levels:5-67-89-1011-121.5 Energy comes in different forms and can be divided into categories. 7.4 Increasing demand for and limited supplies of fossil fuels affects quality of life. 3.1 The Sun is the major source of energy for organisms and the ecosystems of which they are a part1.2 The energy of a system or object that results in its temperature is called thermal energy. 3.2 Food is a biofuel used by organisms to acquire energy for internal living processes. 7.5 Access to energy resources affects quality of life.