[ Vocabulary ]
a physical system that does not allow transfer of matter in or out of the system
A. conservation of matter
B. closed system
C. reactant
D. chemical reaction
Random Topics:
Articles and PronounsGrammar (either..or.. and neither..nor..)Adverbs of Manner, Likes and PreferencesVocabulary and PrepositionsIndirect SpeechDemonstrative PronounModals and Past ModalsProgressive TensePast Simple VerbsTenses and VerbsOther quiz:
Grammar › ViewWhich word appeals to our sense of hearing?
A. heavy
B. light
C. wind
D. whoosh
Grammar › View
I ___ in Los Angeles for 5 years (I no longer live there)
A. have lived
B. lived
C. live
Grammar › ViewThe adjectives are words use to describe a person, place or thing
A. TRUE
B. FALSE
Question Tags › View
You didn’t turn of the light,……?
A. right
B. did you
C. didn’t you
D. did I