Grammar Quiz

[ Vocabulary ]

The theory that pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle.

A. convergent boundaries

B. Pangea

C. plate tectonics

D. convection currents

Select your answer:
A  B  C  D  E 


Random Topics:

Present SimpleModals of AdvisabilityTypes of PhrasesSimple Compound and Complex SentencesDemonstrative SpeechPresent Simple & ContinuesPreposition on TimeAuxiliaries VerbAdjectives, ING - EDGrammar - Imperatives and Let

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