Question

mini glossary
cleavage: a break in a mineral along a smooth, flat surface
crystal structure: an orderly, repeating pattern of atoms in a crystal
crystallization: the process by which atoms form a solid with an orderly, repeating pattern
fracture: a break in a mineral along a rough or irregular surface
luster: the way that a minerals surface reflects light
mineral: a naturally occurring, inorganic solid that has a crystal structure and a definite chemical composition
ore: a deposit of metallic or non - metallic minerals that can be produced at a profit
streak: the color of a minerals powder

1. review the terms and their definitions in the mini glossary. write a sentence that describes two characteristics of a specific mineral discussed in the lesson. write a sentence that describes two characteristics of a specific mineral discussed in the lesson.
2. write the five characteristics of a mineral in the diagram below.
3. write a sentence to explain why crystals formed from cooling magma vary in size.

what do you think now?
reread the statements at the beginning of the lesson. fill in the after column with an a if you agree with the statement or a d if you disagree. did you change your mind?
connected
log on to connected.mcgraw - hill.com and access your textbook to find this lessons resources.

Explanation:

1. For the first question, using the definitions in the glossary, we can take quartz as an example. Quartz has a crystal - like structure and shows a glassy luster.
2. The five characteristics of a mineral from the definition are: naturally occurring, inorganic, solid, has a crystal structure, and has a definite chemical composition.
3. Crystals formed from cooling magma vary in size because the rate of cooling affects the growth rate of crystals; slower cooling allows larger crystals to form as atoms have more time to arrange themselves.

Answer:

1. Quartz has a crystal - like structure and a glassy luster.
2. Naturally occurring, Inorganic, Solid, Has a crystal structure, Has a definite chemical composition
3. The rate of cooling of magma affects the size of crystals formed; slower cooling leads to larger crystals.