When you tune a radio to a certain station, you match the frequency of the internal electrical circuit to the frequency of that radio station. In so doing, you are employing the principle of
A) forced vibrations.
B) resonance.
C) beats.
D) reverberation.
E) wave interference.
B
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Describe and discuss the early atmosphere of Earth. What was its most likely composition? How was it different from
the present atmosphere and why? What will be an ideal response?
The principle of cross-cutting relationship states that:
a) the older layers in an undeformed sedimentary rock sequence will be at or near the bottom of the sequence b) all sedimentary rock layers were originally horizontal c) if fragments of rock "A" is found within rock "B", then rock "A" is older than rock "B" d) all sedimentary rock layers originally extended in all directions e) if a sequence of sedimentary rock is disrupted by a fault or an igneous intrusion, then the fault or the igneous intrusion is younger than the disrupted layers
Volcanoes are triggered by
A) changes in solar radiation. B) movement of tectonic plates. C) human mining activities. D) major changes in climate.
The brown haze in smog is caused by
A. Chlorofluorocarbons B. NO2 C. Particulates D. Sulfuric acid E. Carbon monoxide