( This ( ( causes ( gases ( to ( ( become ( ( liquids and ) liquids ) ) ( to ( ( become solids ) ( as ( ( the temperature ) decreases ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ causes) (S (NP (NNS gases)) (VP (TO to) (VP (VB become) (NP (NNS liquids) (CC and) (NNS liquids)) (S (VP (TO to) (VP (VB become) (NP (NNS solids)) (SBAR (IN as) (S (NP (DT the) (NN temperature)) (VP (VBZ decreases))))))))))) (. .)))
This causes gases to become liquids and liquids to become solids as the temperature decreases.
(ROOT (S (NP (NNS Gases) (CC and) (NNS liquids)) (VP (VBP become) (NP (NNS solids)) (PP (IN at) (NP (JJ low) (NNS temperatures)))) (. .)))
Gases and liquids become solids at low temperatures.