[ Vocabulary ]
What is a glow in the night sky produced in the upper atmosphere by particles from the solar wind interacting with Earth’s magnetic field called?
A. Corona
B. Aurora
C. Photosphere
D. Sunspot

Random Topics:
To Infinitive or GerundWho vs WhomPossessive Adjective and PronounTenses StructurePronouns and AdverbsPast and Present Continuous tenseSubordinating and Coordinating ConjunctionsRelative ClauseModals TensesPresent Continous TenseOther quiz:
Homophones › ViewJane is self-________; she is always checking her hair to make sure ____ perfect
A. Conscious, its
B. Conscience, it’s
C. Conscience, its
D. Conscious, it’s
Grammar › View
Don’t worry, it’s a simple program to use. You ______________ it in no time, I’m sure.
A. used to use
B. are used to
C. will get used to
Conditional Sentences Type 1 › ViewVivian won’t finish her work if she … right now.
A. doesn’t start
B. won’t start
Regular vs. Irregular Verb › View
It was Julius von Haast who … (study) geology and mineralogy at the University of the Rhine.
- studied
- studyed