What process is the disintegration and decomposition of rock at or near the Earth's surface?
A. weathering
B. lithification
C. erosion
Answer: A
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Instructions: Choose one answer from each pair of selections. A forecast chart representing the atmosphere at a specified future time is a(n) ANALYSIS | PROG
Tectonic plates are pieces of the ________ that float on the more fluid ________ below.
a) asthenosphere; lithosphere b) lithosphere; asthenosphere c) lithosphere; mesosphere d) mantle; crust e) crust; lithosphere
Humans intervene in the nitrogen cycle in several ways. Which of the following is one of these?
A. Burning fossil fuels adds nitric oxide. B. Agriculture decreases the production of nitrous oxides. C. Protecting and replanting forests releases nitrogen. D. Harvesting nitrogen-rich crops stores nitrogen in the topsoil. E. Agriculture with fertilizers uses nitrogen in the aquatic systems.
________ are substances that cause birth defects
A) Carcinogens B) Neurotoxins C) Teratogens D) Vectors E) Allergens