Infrared
What will be an ideal response?
Electromagnetic waves of frequencies lower than the red of visible light. Heat signatures.
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The ultimate cause of tectonic plate motion is the
A) second law of thermodynamics. B) tendency for heat to spread out. C) escape of heat from Earth's interior. D) all of the above
What did Polynesians use to determine if an island was near, but could not be seen yet?
A) The change in the rhythmic set of waves against the hull B) The Flight tracks of birds at dusk C) The Smell of the water D) All of these choices were used
Which of the following fossils would be a good example of an index fossil?
A) snake B) jellyfish C) frog D) marine microfossils
What is the IUPAC name of (CH3)2NC2H5?
A) ethyldimethylamine B) dimethylethylamine C) N,N-dimethylethanamine D) none of these