Which layer is the thin, upper portion of the mantle and the outermost crust, composed of cooler, brittle rock?

Study for the Praxis Elementary Education: Three-Subject Bundle – Science (5905) Test. Access flashcards and multiple choice questions with hints and explanations to prepare effectively for your science exam!

Multiple Choice

Which layer is the thin, upper portion of the mantle and the outermost crust, composed of cooler, brittle rock?

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