Most of the Sun's energy that reaches Earth's surface is in and near the ________ portion of the spectrum
A) cosmic
B) infrared
C) microwave
D) ultraviolet
E) visible
E
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________ is the theory that describes the motion of the Earth's lithosphere
A) Plate tectonics B) Sea floor spreading C) Pangaea D) Metamorphism
Consider the various frequencies of the three photons emitted from the following three individual electron transitions in the figure below: n = 3 to n = 2; n = 2 to n = 1; n = 3 to n = 1. These transitions would produce three spectral lines in a spectroscope. If the energy spacing between the levels were equal, would this affect the number of spectral lines?
A. Yes, two otherwise separate lines would converge into a single more intense line. B. No, but some would then require a prism in order to be seen. C. No, but the spacing between the spectral lines would change. D. Yes, two otherwise separate lines would converge into a single less intense line.
Which of the following types of cells is responsible for the release of antibodies?
A) macrophages B) dendritic cells C) B cells D) T cells
Most comets originate in the ________
A) Kuiper Belt B) Saturn's Rings C) Oort Cloud D) Kuiper Belt and Oort Cloud