Earthquakes [electronic resource] : A Teacher's Package for K-6.
Like rain, an earthquake is a natural occurrence which may be mild or catastrophic. Although an earthquake may last only a few seconds, the processes that cause it have operated within the earth for millions of years. Until recently, the cause of earthquakes was a mystery and the subject of fanciful...
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Format: | Electronic eBook |
Language: | English |
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[S.l.] :
Distributed by ERIC Clearinghouse,
1988.
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Internet
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ED304306
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ED304306 | Available |