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 that describe the substance without changing it chemically.

- 1. flammable: Chemical Property (describes how the substance reacts with fire)
- 2. mixing: Physical Change (no new substance is formed)
- 3. tarnishing: Chemical Change (formation of a new substance, usually a compound)
- 4. combustible: Chemical Property (describes how the substance 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 but no new substance is formed)
- 8. melting: Physical Change (change in state from solid to liquid)
- 9. density: Physical Property (measurable characteristic of a substance)
- 10. rotting: Chemical Change (decomposition process involving new substances)
- 11. rusting: Chemical Change (formation of iron oxide)
- 12. freezing: Physical Change (change in state from liquid to solid)
- 13. cutting: Physical Change (change in shape but no new substance is formed)

#### 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 involve changes in physical properties without forming new substances.

- 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
These are measurable or observable characteristics of a substance.

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

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

- 1. flammable: Chemical Property
- 4. combustible: Chemical Property

#### Step 7: Classify Physical Changes
These involve changes in physical properties without forming new substances.

- 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
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:

\[
\boxed{
\begin{array}{ll}
\textbf{Physical Properties:} & 5. 88 \text{ degrees}, 9. \text{density} \\
\textbf{Chemical Properties:} & 1. \text{flammable}, 4. \text{combustible} \\
\textbf{Physical Changes:} & 2. \text{mixing}, 7. \text{molding clay}, 8. \text{melting}, 12. \text{freezing}, 13. \text{cutting} \\
\textbf{Chemical Changes:} & 3. \text{tarnishing}, 6. \text{bread molding}, 10. \text{rotting}, 11. \text{rusting}
\end{array}
}
\]