Define metamorphic grade.
Answer: The degree to which a parent rock changes during metamorphism.
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What it the main difference between an ionic and a covalent bond?
A. Both bonds are the same, but named different to describe different atoms involved. B. The electrons in both types of bonding undergo an exchange. C. One is the sharing of a pair of electrons, and the other is the transfer of at least one electron. D. The electrons are traded between the two atoms and this keeps the atoms close. E. One involves electrons, and the other does not involve any electrons.
The source of energy for reactions on the sun is ________
A) nuclear fusion B) hydrogen fuel C) natural gas D) nuclear fission
The common rock produced by the metamorphism of limestone is ________
A) gneiss B) phyllite C) marble D) mica schist
Scientific results are unpredictable and are mainly determined by the personal views of the scientists.
Answer the following statement true (T) or false (F)