The theory of continental drift was first presented in 1912 by Alfred Wegener
Indicate whether the statement is true or false
true
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The highest peaks of the Himalayas exceed what elevation?
A) 16,000 feet B) 19,000 feet C) 22,000 feet D) 13,000 feet E) 25,000 feet
What percentage of parent isotope is remaining if 1 half life has elapsed?
- 6.25%
- 12.5%
- 25%
- 50%
- 100%
Placers are sedimentary deposits where valuable minerals have been hydraulically sorted. Which of the following mineral properties are required for hydraulic sorting by streams to be effective?
A. high solubility and high density B. small grain size and well-rounded shape C. large grain size and high solubility D. high density and high chemical resistance E. well-rounded shaped and high chemical resistance
Pictured here is a model of how the atmosphere is heated. Which arrow represents heating of the earth's atmosphere by long wave radiation?
A. infrared energy emitted by land B. energy absorbed by land C. insolation reflected by land D. insolation reflected by clouds