Science 7(0.3)

1. 1. Who Particulate Nature of Matter? * All matter is made up of tiny particles called atoms. * Atomos means indivisible

   • * If you cut the material in half the properties remain the same.

• A. Democritus'

• B. Aristotle's

2. 2. Who Particulate Nature of Matter? * All substances are made up of the four elements of matter; air, earth, fire and water

• A. Democritus'

• B. Aristotle's

3. 3. * All substances, whether solid, liquid, or gas,

   are composed of tiny particles too small to be seen with the naked eye.

• A. Matter is Made of Particles

• B. Particles are in Constant Motion

4. 4. * These particles are not static; they are constantly

   moving, and their motion is related to temperature and the state of matter. 

• A. Matter Made of Particles

• B. Particles are in Constant Motion

5. 5. Arrangement & Motion by State

   • * Particles vibrate in fixed positions — rigid shape, hard to compress.

• A. Solids

• B. Liquids

• C. Gases

6. 6. Arrangement & Motion by State

   • * Particles slide past each other — flows, changes shape.

• A. Solids

• B. Liquids

• C. Gases

7. 7. Arrangement & Motion by State

8. * Particles move fast and freely — fills any container, easily

• A. Solids

• B. Liquids

• C. Gases

8. 8. It is a physical change from one state of matter to another. •Occurs when heat energy is added or removed.

   •Common phases: solid, liquid, gases.

• A. Phase Change

• B. Temperature

• C. Pressure

9. 9. Why Do Phase Changes Occur?

   •____: Adding heat

   increases particle motion; removing it

   slows them down.

• A. Phase Change

• B. Temperature

• C. Pressure

10. 10. Why Do Phase Changes Occur?

11. ____: Increasing pressure can

    force particles closer, favoring solid

    or liquid states; lowering pressure

    can allow expansion into gas.

• A. Phase Change

• B. Temperature

• C. Pressure