( ( ( In ( this activity ) ) ( you ( will ( ( ( ( extract one ) ( to ( these ( natural ( acid-base indicators ) ) ) ) ) and ) ( use ( it ( to ( find ( ( the ( approximate ( pH values ) ) ) ( of ( some substances ) ) ) ) ) ) ) ) ) ) ) ( you ( ( might ( find ( ( ( at home ) or ) ( at school ) ) ) ) . ) ) )
(ROOT (S (S (PP (IN In) (NP (DT this) (NN activity))) (NP (PRP you)) (VP (MD will) (VP (VP (VB extract) (NP (CD one)) (PP (TO to) (NP (DT these) (JJ natural) (JJ acid-base) (NNS indicators)))) (CC and) (VP (VB use) (S (NP (PRP it)) (VP (TO to) (VP (VB find) (NP (NP (DT the) (JJ approximate) (NN pH) (NNS values)) (PP (IN of) (NP (DT some) (NNS substances))))))))))) (NP (PRP you)) (VP (MD might) (VP (VB find) (PP (PP (IN at) (NP (NN home))) (CC or) (PP (IN at) (NP (NN school)))))) (. .)))
In this activity you will extract one to these natural acid-base indicators and use it to find the approximate pH values of some substances you might find at home or at school.
(ROOT (S (SBAR (IN If) (S (NP (DT a) (NN substance)) (VP (VBZ has) (NP (DT a) (NN ph) (NN value)) (NP (QP (JJR greater) (IN than) (CD 7)))))) (, ,) (NP (DT that)) (VP (VBZ indicates) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ is) (NP (NN base)))))) (. .)))
If a substance has a ph value greater than 7,that indicates that it is base.