Translations:Adventist Youth Honors Answer Book/Nature/Rocks & Minerals/19/en
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5. Define cleavage, specific gravity, luster, color, streak, texture, crystal.
The terms that follow have specific meaning in mineralogy, and are useful for identifying the type of a specimen of rock or mineral. To the uneducated eye, a rock is a rock is a rock. But if the following terms are understood, noted, and cross-checked against known values for various specimens, a positive identification can be made.
a. Cleavage
Adventist Youth Honors Answer Book/Nature/Rocks & Minerals/Cleavage
b. Specific gravity
Specific gravity is the ratio of the density of a material relative to the density of water. Density is the ratio of an object's mass to its volume. For instance, we know that 1 cm^3 of water weighs 1 gram. Therefore, the density of water is:
