( ( ( Thermosphere - ) ( ( The ( upper layer ) ) ( of ( ( ( the ( earth 's ) ) atmosphere ) ( -LRB- ( ( ( 100 km ) ( to ( approximately ( 1000 km ) ) ) ) -RRB- ) ) ) ) ) ) . )
(ROOT (NP (NP (NNP Thermosphere)) (: -) (NP (NP (DT The) (JJ upper) (NN layer)) (PP (IN of) (NP (NP (NP (DT the) (NN earth) (POS 's)) (NN atmosphere)) (PRN (-LRB- -LRB-) (NP (NP (CD 100) (NN km)) (PP (TO to) (NP (RB approximately) (CD 1000) (NN km)))) (-RRB- -RRB-))))) (. .)))
Thermosphere- The upper layer of the earth's atmosphere (100 km to approximately 1000 km).
(ROOT (S (NP (NNP Thermosphere)) (VP (VBZ is) (NP (DT the) (JJ upper-most) (NN atmosphere))) (. .)))