What is the major distinction between internal and external Earth processes?
A) Internal processes involve heat, and external processes involve oxygen.
B) Internal processes can only occur inside the Earth, but external processes can occur inside or outside the Earth.
C) Internal processes are driven by things like Plate Tectonics, and external processes are driven by the sun.
D) Internal and external processes can occur inside and outside the Earth, but external processes must also include the oxidation of Earth materials.
C
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Which of the following best matches the description?Characteristic of materials that easily begin to burn.
A. waste minimization B. acute toxicity C. threshold levels D. chronic toxicity E. hazardous wastes F. ignitability G. RCRA H. National Priority List I. reactivity J. synergism K. corrosiveness L. LD50 M. CERCLA N. toxicity O. Superfund
A study of jet contrails following the grounding of commercial flights after the September 11, 2001 terrorist attacks found that
A) contrails have a very limited effect on the Earth's energy budget. B) contrails reduce diurnal temperature ranges in regions with a high density aircraft. C) contrails contribute more to cloud-albedo forcing than cloud-greenhouse forcing. D) contrails are difficult to distinguish from natural cirrus clouds.
Scrub vegetation refers to
A) woody plants with small, leathery evergreen leaves. B) drought resistant plants. C) a plant that survives seasonally unfavorable conditions underground. D) low shrubs and grasses with some adaptations to semiarid conditions. E) overstory (emergent layer) trees.
Waves at the ocean surface are ________ waves
A) longitudinal B) orbital C) reflective D) refractive E) transverse