Rocks and Minerals — Test

Question 18 • Earth and Space Science

How do temperature, pressure, and environmental conditions during mineral formation influence the minerals that result?

Answer

They alter the depth at which minerals occur in Earth’s crust but do not change their structural or physical properties.

They mainly affect the external size of crystals, while internal structure and related properties remain unchanged.

They control atomic bonding patterns that produce distinct crystal frameworks, which in turn determine hardness, cleavage, and other visible traits.

They produce temporary changes in color and luster, but internal structure and long-term physical behavior remain constant.

Explanation

Temperature, pressure, and other formation conditions influence how atoms bond and arrange themselves as a mineral forms. Different arrangements create different crystal structures, which affect properties such as hardness and cleavage. Choice C correctly connects formation conditions to crystal frameworks and the traits those frameworks produce.

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