When white light is dispersed in a prism, the fastest light is
A) red.
B) orange.
C) green.
D) blue.
E) same in all
Answer: A
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If you heat a gas so that collisions are continually bumping electrons to higher energy levels, when the electrons fall back to lower energy levels the gas produces
A) thermal radiation. B) radio waves. C) an absorption line spectrum. D) an emission line spectrum. E) X-rays.
If you strip electrons from an atom, the atom becomes a
A) positive ion. B) negative ion. C) different element.
A floating object displaces its own
1) volume, 2) weight, 3) density, and a submerged object displaces its own 4) volume. 5) weight. 6) density.
Why does the abundance of iridium suggest that the iridium came from an impact?
A. Iridium is rare on Earth's surface but common in meteorites that have impacted the Earth. B. Iridium forms in forest fires, which were presumably ignited by the impact. C. Iridium can only be made under the high-pressure conditions of an impact. D. Iridium does not exist on Earth, so it must have come from space.