Sea levels 18,000 years ago were approximately
A) 10 m (33 ft) higher than they are today. B) 50 m (165 ft) higher than they are today.
C) 25 m (82 ft) lower than they are today. D) 100 m (330 ft) lower than they are today.
D
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The average velocity of a wave that travels an average distance of 2.5 m in 1 s
A. 0.5 m/s. B. 5 m/s. C. 2.5 m/s. D. 1 m/s.
Referring to the figure below, which of the following types of thunderstorms are forming to the right of the line that separates dry and moist air masses?
?
A. adiabatic B. severe C. dryline D. derecho
Which of the following best characterizes an angular unconformity?
A) Horizontal lava flows lie below the unconformity and horizontal; sedimentary strata lie above. B) Tilted strata that lie below the unconformity are truncated at the unconformity, and strata above the unconformity are also tilted and truncated, but at a different angle C) The discordant boundary between older strata and an intrusive body of granite. D) Tilted strata lie below the unconformity; bedding in younger strata above is parallel to the unconformity.
Effects of ice ages are confined to regions directly covered by ice; global climate is unaffected and areas away from the glaciers preserve their usual temperature and moisture patterns.
Answer the following statement true (T) or false (F)