Physical and Chemical Changes online worksheet for 8 - Free Printable

Problem Overview:

The task is to classify the given terms into four categories:
1. Physical Properties
2. Chemical Properties
3. Physical Changes
4. Chemical Changes

We will use the definitions provided in the review section to guide our classification:
- Physical Property: Describes something about a substance that can be detected with the five senses or measured (e.g., color, density, temperature).
- Chemical Property: Describes how a substance will react with other substances (e.g., flammability, reactivity).
- Physical Change: A change in a physical property of a substance without altering its identity (e.g., melting, freezing, cutting).
- Chemical Change: A change where a new substance is formed due to a chemical reaction (e.g., rusting, souring, decomposing).

Solution:

#### Step 1: Classify Physical Properties
These are characteristics of a substance that can be observed or measured without changing the substance's identity.

- 1. Flammable: Chemical Property (describes how it reacts with fire)
- 2. Mixing: Physical Change (no new substance is formed)
- 3. Tarnishing: Chemical Change (formation of a new substance on the surface)
- 4. Combustible: Chemical Property (describes how it reacts with oxygen)
- 5. 88 degrees: Physical Property (temperature measurement)
- 6. Bread molding: Chemical Change (involves decomposition and formation of mold)
- 7. Molding clay: Physical Change (shape changes, no new substance)
- 8. Melting: Physical Change (change in state, no new substance)
- 9. Density: Physical Property (measurable characteristic)
- 10. Rotting: Chemical Change (decomposition process)
- 11. Rusting: Chemical Change (formation of iron oxide)
- 12. Freezing: Physical Change (change in state, no new substance)
- 13. Cutting: Physical Change (shape changes, no new substance)

#### Step 2: Classify Chemical Properties
These describe how a substance will react with other substances.

- 1. Flammable: Chemical Property
- 4. Combustible: Chemical Property

#### Step 3: Classify Physical Changes
These are changes in the physical state or form of a substance without forming a new substance.

- 2. Mixing: Physical Change
- 7. Molding clay: Physical Change
- 8. Melting: Physical Change
- 12. Freezing: Physical Change
- 13. Cutting: Physical Change

#### Step 4: Classify Chemical Changes
These involve the formation of new substances through chemical reactions.

- 3. Tarnishing: Chemical Change
- 6. Bread molding: Chemical Change
- 10. Rotting: Chemical Change
- 11. Rusting: Chemical Change

#### Step 5: Classify Physical Properties (continued)
These are measurable or observable characteristics of a substance.

- 5. 88 degrees: Physical Property
- 9. Density: Physical Property

#### Step 6: Classify Chemical Properties (continued)
These describe how a substance will react with other substances.

- 1. Flammable: Chemical Property
- 4. Combustible: Chemical Property

#### Step 7: Classify Physical Changes (continued)
These are changes in the physical state or form of a substance without forming a new substance.

- 2. Mixing: Physical Change
- 7. Molding clay: Physical Change
- 8. Melting: Physical Change
- 12. Freezing: Physical Change
- 13. Cutting: Physical Change

#### Step 8: Classify Chemical Changes (continued)
These involve the formation of new substances through chemical reactions.

- 3. Tarnishing: Chemical Change
- 6. Bread molding: Chemical Change
- 10. Rotting: Chemical Change
- 11. Rusting: Chemical Change

Final Classification:

#### Physical Properties
- 5. 88 degrees
- 9. Density

#### Chemical Properties
- 1. Flammable
- 4. Combustible

#### Physical Changes
- 2. Mixing
- 7. Molding clay
- 8. Melting
- 12. Freezing
- 13. Cutting

#### Chemical Changes
- 3. Tarnishing
- 6. Bread molding
- 10. Rotting
- 11. Rusting

Final Answer:

\[
\boxed{
\begin{array}{ll}
\textbf{Physical Properties:} & 5. 88 \text{ degrees}, 9. \text{Density} \\
\textbf{Chemical Properties:} & 1. \text{Flammable}, 4. \text{Combustible} \\
\textbf{Physical Changes:} & 2. \text{Mixing}, 7. \text{Molding clay}, 8. \text{Melting}, 12. \text{Freezing}, 13. \text{Cutting} \\
\textbf{Chemical Changes:} & 3. \text{Tarnishing}, 6. \text{Bread molding}, 10. \text{Rotting}, 11. \text{Rusting}
\end{array}
}
\]