Elliptical galaxies contain only Population ________ stars and little gas and dust
Fill in the blank(s) with correct word
II
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A neutral atom must have ____
a. an equal number of protons and neutrons b. an equal number of protons and electrons c. an equal number of neutrons and electrons d. less electrons than protons e. more electrons than neutrons
The following statements are all true. Which one counts as an "exception to the rule" in being unusual for our solar system?
A) The diameter of Earth's Moon is about 1/4 that of Earth. B) Venus does not have a moon. C) Jupiter has a small axis tilt. D) Saturn has no solid surface.
What happens when an electron in an atom absorbs a photon?
A. The electron moves to the nucleus. B. The electron moves to a lower energy level. C. The electron turns into a proton. D. The electron moves to a higher energy level.
A temperature of degrees 290 Fahrenheit is equivalent to _____ degrees Celsius
a. 62.6 b. 554.0 c. 143.3 d. 17.0