[ Vocabulary ]
a process in which one or more substances are converted to one or more different substances
A. conservation of matter
B. closed system
C. chemical reaction
D. reactant
Random Topics:
Too or EnoughTransitional WordsPast Tense (Regular and Irregular)Articles and DemonstrativesPassive and Active VoicePresent Progressive or Present SimpleTenses - Present and PastStative Verbs and TensesAdjectives, Adverbs, and PrepositionsRelative Clauses & Real ConditionalsOther quiz:
Tenses › ViewI never thought that I ……… see him again.
A. would
B. will
C. had
Relative & Modals › View
Fill in the blank with the word or phrase that most naturally completes the phrase: sit in the front _______
A. grow up
B. mood
C. row
D. suggestion
E. the wild
Vocabulary › Viewto ask questions, examine by questioning
A. interrogate
B. trivial
C. vicious
D. truce
Grammar › View
What are the four principal parts of a verb?
A. Infinitive, present participle, past, past participle
B. Infinitive, present, future, past
C. Present, past, future, past participle
D. Infinitive, present, past, future participle