If a foreign atom is more than _____________% larger than its host, it normally does not form a continuous substitutional solid solution.
Fill in the blank(s) with the appropriate word(s).
15
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Meteor showers result when asteroids collide and this debris showers the inner solar system
Indicate whether the statement is true or false
Which of the following observations is not a piece of evidence supporting the Big Bang theory?
A) darkness of the night sky B) recession speeds of far away galaxies relative to close ones C) observed helium abundance in the universe D) relative motions of galaxies in the Local Group
An asteroid revolves around the Sun with a perihelion 0.5 AU and an aphelion of 7.5 AU. What is its period of revolution?
A. 4 years B. 8 years C. 16 years D. 32 years E. 64 years
What event marks the birth of a star, and what event marks its death?
What will be an ideal response?