Lava rocks formed less than 800,000 years ago are found to have a different _____ than lava rocks formed over 1.5 million years ago.
A ) magnetic polarity
B ) mineral composition
C ) magnetic strength
D ) precious metal content
A ) magnetic polarity
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While out in the western United States on a field trip, you collect some beautiful specimens of petrified wood. You are
probably collecting petrified wood in which Triassic formation? a. Chinle b. Morrison c. Navajo d. Sundance e. Wingate
Which of the following happens along oceanic divergent boundaries?
a) oceanic crust moves toward the ridge in a conveyor-belt manner b) most of the mantle is molten, not solid c) solid asthenosphere rises as plates move apart d) magma generated in the crust drips down into the mantle e) all of the above happens along divergent boundaries
________ is the process by which thickened crust adjusts over time to a "normal" thickness
A) Subduction B) Convection C) Accretion D) Isostacy
Which of the following organizations was NOT part of the development of the European Union?
A. EEC B. Common Market C. Warsaw Pact D. Benelux