Question

Chemical
Change
Physical
Change
No Change
Occurred
The toast starts burning.
The butter she places on the toast melts.
She begins cooking eggs
She puts some toast in the toaster.
She mixes some eggs with a little milk in a
bowl.
A) A woman makes breakfast. Correctly identify each scenario as a physical change, chemical change
or no change has occurred. (5 points)

Answer 1

Here’s the classification for each scenario:

1. **The toast starts burning.** - **Chemical Change** (burning toast involves a reaction that changes the composition of the bread).

2. **The butter she places on the toast melts.** - **Physical Change** (melting butter changes its state from solid to liquid but does not alter its chemical structure).

3. **She begins cooking eggs.** - **Chemical Change** (cooking eggs causes a chemical reaction that changes their proteins, resulting in a solid structure).

4. **She puts some toast in the toaster.** - **No Change Occurred** (putting toast in the toaster is a preparatory step; no physical or chemical change has occurred yet).

5. **She mixes some eggs with a little milk in a bowl.** - **Physical Change** (mixing eggs and milk does not change their chemical properties, it simply combines them).

So the summary is:

1. **Chemical Change**
2. **Physical Change**
3. **Chemical Change**
4. **No Change Occurred**
5. **Physical Change**