Well....radiation it a movement (Transfer ) of heat through electromagnetic waves( Example .....Sun Rays)
So a example would be getting sun burned on a hot day by the suns rays
A cloud is formed because the water vapor gathers in groups
All chemical reactions involve energy. Energy is used to break bonds in reactants, and energy is released when new bonds form in products. Endothermic reactions absorb energy, and exothermic reactions release energy. The law of conservation of energy states that matter cannot be created or destroyed.