Energy: Some Basic Principles
What is the primary source of energy on Earth?
Sun
What is the unit used to measure energy?
Joule
Which form of energy is stored in a battery?
Chemical energy
What is the process of converting sunlight into electricity called?
Photovoltaics
Which type of energy resource is considered renewable?
Wind
What is the formula to calculate mechanical energy?
E = ½mv²
Which energy transformation occurs when a match is lit?
Chemical energy to thermal energy
What type of energy is associated with motion?
Kinetic energy
Which energy resource contributes to air pollution?
Coal
What is the law of conservation of energy?
Energy cannot be created or destroyed, only converted from one form to another.