CK-12 Physical Science Concepts - For Middle School

http://www.ck12.org Chapter 2. Matter

FIGURE 2.23

Vocabulary

• solid: State of matter that has a fixed volume and fixed shape.

Explore More

At the following URL, read the article about solids. Then answer the questions below.

http://www.chemistryexplained.com/Ru-Sp/Solid-State.html

1. According to the article, what is the only way the shape of a solid can be changed? Give an example.


2. Describe the analogy in the article in which crystalline and amorphous solids are compared to a classroom.

Review

1. What is a solid?


2. Why does a solid have a fixed shape and fixed volume?


3. Create a table comparing and contrasting crystalline and amorphous solids. Include an example of each type
   of solid in your table.


4. Diamonds like the one pictured in theFigure2.24 are the hardest of all minerals. Is a diamond a crystalline
   or an amorphous solid? How do you know?