solids

types of solids

Not all solids are alike. Some are crystalline solids; others are amorphous solids. Snowflakes are crystalline solids. Particles of crystalline solids are arranged in a regular repeating pattern, as you can see in the sketch in Figure chloride). Crystals of table salt are pictured in the Figure 1.1. Amorphous means shapeless. Particles of amorphous solids are arranged more-or-less at random and do not form crystals, as you can see in the Figure 1.2. An example of an amorphous solid is cotton candy, also shown in the Figure 1.2. Q: Look at the quartz rock and plastic bag pictured in the Figure 1.3. Which type of solid do you think each of them is? A: The quartz is a crystalline solid. Rocks are made of minerals and minerals form crystals. You can see their geometric shapes. The bag is an amorphous solid. It is made of the plastic and most plastics do not form crystals.

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snowflakes and other solids

A snowflake is made of ice, or water in the solid state. A solid is one of four well-known states of matter. The other three states are liquid, gas, and plasma. Compared with these other states of matter, solids have particles that are much more tightly packed together. The particles are held rigidly in place by all the other particles around them so they cant slip past one another or move apart. This gives solids a fixed shape and a fixed volume.

instructional diagrams

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questions

the particles of solids are more tightly packed together than the particles of other states of matter.

-->  a. true

b. false

which statement about solids is false?

a) solids have a fixed shape.

b) solids have a fixed volume.

-->  c) all solids have the same structure.

d) none of the above

examples of amorphous solids include

a) table salt.

b) quartz.

-->  c) plastic.

d) two of the above

amorphous solids have particles that are arranged randomly.

-->  a. true

b. false

diagram questions

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