A. Describing Matter

1. A form of matter is another name for a(n) __state_________________ of matter.

a. The three most common states of matter on Earth are solids,

_liquids_________________, and gases.

b. Most of the matter in space is in a fourth state of matter called

_plasma__________________, which is high-energy matter consisting of positively and negatively charged particles.

2. ___________________________ can be described in many ways.

a. Some descriptions, such as color and odor, involve using

your ____________________________.

b. Other descriptions, such as mass or volume, are ______________________.

3. Particle _____________________ and particle ______________________

determine a substance’s state of matter.

a. No matter how close they are to each other, all particles have

________________________ motion.

b. Particles that are free to move will move in a(n) _______________________

line until they _______________________ with something.

4. There is a force of ______________________ between positively charged

____________________ and negatively charged ___________________.

a. When particles move __________________, they move closer together,

and the attractive forces between them are __________________.

b. When particles move ___________________, they move farther apart,

and the attractive forces between them are _____________________.

B. Solids

1. A solid has a definite _______________________ and a

definite ______________________.

2. The type of solid depends on how the ___________________________ in the

solid are arranged.

a. When the particles are arranged in a specific, repeating order, the solid is a(n)

________________________ solid.

b. If the particles are randomly arranged, the solid is a(n)

________________________ solid.

C. Liquids

1. A liquid has a definite _________________________ but no

definite ______________________.

2. Unlike solids, liquids flow and can take the ________________________ of their container.

3. The particle motion in a liquid state of a substance is ____________________ than the particle motion in substance’s solid state.

4. The attractive forces between the particles in a liquid are _________________

than they are in a solid.

5. A measurement of a liquid’s resistance to flow is its ____________________.

6. The attraction between molecules that are alike, such as water molecules, is

called ___________________________.

7. Molecules at the surface of a liquid also have ___________________, which

involves the uneven forces acting on the particles on the surface of a liquid.

8. Usually, stronger ______________________ forces between particles is linked to a greater of a liquid.

D. Gases

1. A gas has no definite ___________________________ and no

definite _________________________.

2. The distances between gas particles are so _____________________ and the

attractive forces so _______________________ that gas particles spread out to fill their container.

3. The gas state of a substances that is usually a solid or a liquid at room temperature is called a(n) _____________________.