( Rotation ( ( is ( when ( ( the Earth ) ( ( ( rotates ( on ( its axis ) ) ) , ) ( causing ( the ( Earth ( to ( face ( ( ( the sun ) , ) ( which ( makes ( ( day and ) night ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Rotation)) (VP (VBZ is) (SBAR (WHADVP (WRB when)) (S (NP (DT the) (NN Earth)) (VP (VBZ rotates) (PP (IN on) (NP (PRP$ its) (NNS axis))) (, ,) (S (VP (VBG causing) (NP (DT the) (NN Earth) (S (VP (TO to) (VP (VB face) (NP (NP (DT the) (NN sun)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ makes) (NP (NN day) (CC and) (NN night)))))))))))))))) (. .)))
Rotation is when the Earth rotates on its axis , causing the Earth to face the sun , which makes day and night .
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (QP (JJR fewer) (IN than) (CD 24)) (NNS hours)) (PP (IN of) (NP (NP (NN daylight)) (PP (IN in) (NP (NN alaska)))))) (PP (IN during) (NP (NP (DT each) (NN day)) (PP (IN in) (NP (NNP april))))) (SBAR (IN because) (S (NP (NP (NN earth) (POS 's)) (NN rotation)) (VP (VBZ causes) (NP (DT both) (NN day) (CC and) (NN night)))))) (. .)))