[ 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:
Mixed General Quiz › View___, Mary! Come here! I want to talk to you.
a. Oops
b. Mmm
c. Hey
Subject Verb Agreement › View
Identify the correct verb: The quality of the products _______ improved significantly.
A. is
B. has
C. had
D. improves
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