It is possible for regional average temperatures to change by more than 5°C in less than a decade.
Answer the following statement true (T) or false (F)
True
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You find an old tree stump in a forest and would like to use it for tree-ring analysis, but you don't know when the tree was cut down. The best way to establish dates for the analysis is to:
A) submit the tree stump to carbon-14 dating analysis. B) estimate the age of the tree stump based on the level of decay it has experienced. C) assign small rings to years of known droughts. D) compare patterns in the tree rings to ring chronologies sampled from nearby trees on known dates.
What was the origin of the gas that killed 1,700 people in Cameroon in 1996?
A. It flowed down the side of an erupting volcano. B. It leaked upward from basaltic magma underlying a lake. C. It was released in a lateral blast of a cinder cone. D. It was released from a geyser in a nearby national park. E. It was formed when acid rain fell on volcanic soils.
Two different air masses oppose each other with little or no movement at:
a. a cold front. b. a stationary front. c. a warm front. d. an occluded front.
Which of the numbered features is a lava flow?
A. 1 B. 2 C. 3 D. 4 E. 5