Question 1
Limestone is composed almost entirely of calcite, which has the chemical formula CaCO
3. As a result, limestone is classified as ________.
◦ a rock
◦ a mineral
◦ both a mineral and a rock
◦ neither a mineral nor a rock because it is organic
Question 2
Which of the following best defines a mineral and a rock?
◦ A rock has an orderly, repetitive, geometrical, internal arrangement of minerals; a mineral is a lithified or consolidated aggregate of rocks.
◦ In a mineral the constituent atoms are bonded in a regular, repetitive, internal structure; a rock is a lithified or consolidated aggregate of different mineral grains.
◦ A mineral consists of its constituent atoms arranged in a geometrically repetitive structure; in a rock, the atoms are randomly bonded without any geometric pattern.
◦ A rock consists of atoms bonded in a regular, geometrically predictable arrangement; a mineral is a consolidated aggregate of different rock particles.
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