( ( All ( of ( ( the ( earth 's ) ) energy ) ) ) ( ( is ( ( transferred ( from ( the Sun ) ) ) ( by radiation ) ) ) . ) )
(ROOT (S (NP (NP (DT All)) (PP (IN of) (NP (NP (DT the) (NN earth) (POS 's)) (NN energy)))) (VP (VBZ is) (VP (VBN transferred) (PP (IN from) (NP (DT the) (NNP Sun))) (PP (IN by) (NP (NN radiation))))) (. .)))
All of the earth's energy is transferred from the Sun by radiation.
(ROOT (S (NP (NP (NNP Heat) (NN energy)) (PP (IN from) (NP (DT the) (NN sun)))) (VP (VBZ is) (VP (VBN transferred) (PP (TO to) (NP (NN earth))) (PP (ADVP (RB primarily)) (IN by) (NP (NN radiation))))) (. .)))
Heat energy from the sun is transferred to earth primarily by radiation.