Most caves and caverns from above the water table.
a. true
b. false
b. false
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What evidence might suggest a time interval between two rock layers?
A) a metamorphosed band in the bottom layer B) a metamorphosed band in the top layer C) a coal layer between the two layers D) an irregular boundary between the two layers
Which of the following most accurately indicates the recent changes that have occurred in China?
A) As the Chinese economy has grown, industrial pollution and poverty have increased while literacy and public health have declined. B) As the Chinese economy has grown, the uses of coal and electricity have increased while social mobility and literacy have declined. C) As the Chinese economy has grown, literacy and public health have improved while industrial pollution and poverty have declined. D) As the Chinese economy has grown, industrial pollution and literacy have increased while poverty and public health have declined.
Asthma is a serious and widespread disease related to air pollution. Symptoms of asthma include impaired breathing resulting from constricted air passages, a disorder of the
A) digestive system. B) cardiovascular system. C) endocrine system. D) immune system.
Ozone is concentrated in the ________
A) ionosphere B) mesosphere C) stratosphere D) troposphere