Topics: Vocabulary
An event, condition, or factor that can be changed or controlled in order to study or test a hypothesis in a scientific experiment.
A. field study
B. trials
C. evidence
D. variable
Select your answer:
Random Topics:
Past TenseGrammar - used toNouns & PronounsModal "Have to"PrepositionsPresent and Past Simple PassiveTransitive or Intransitive VerbsGerund NounDemonstrative PronounTenses & PassiveOther quiz:
Adverbs › View“The children played outside.” What kind of adverb is “outside”?
A. Adverb of manner
B. Adverb of place
C. Adverb of frequency
D. Adverb of time
Verbs & Verb Tenses › View
. Used for a finished action in the past with no connection to now.
A. Present simple
B. Past simple
C. Past continuous
D. Present perfect