( ( ( ( Forms ( of energy ) ) : ) ( ( Investigate situations ) ( ( in which ) ( ( changes ( in matter ) ) ( also ( ( give off ) ( energy ( as ( light ( , ( ( heat or ) sound ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NP (NNS Forms)) (PP (IN of) (NP (NN energy)))) (: :) (NP (NP (JJ Investigate) (NNS situations)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (NP (NNS changes)) (PP (IN in) (NP (NN matter)))) (ADVP (RB also)) (VP (VB give) (PRT (RP off)) (NP (NP (NN energy)) (PP (IN as) (NP (NN light) (, ,) (NN heat) (CC or) (NN sound)))))))) (. .)))
Forms of energy: Investigate situations in which changes in matter also give off energy as light, heat or sound.
(ROOT (S (NP (NP (NNP Heat)) (, ,) (NP (NN light)) (, ,) (CC and) (NP (NN sound))) (VP (VBP are) (NP (NP (DT all) (JJ different) (NNS forms)) (PP (IN of) (NP (NN energy))))) (. .)))