Question
Putting makeup on your cheeks
Perfume evaporates into the air
Decomposer breaks down a dead tree
Peeling an orange
Rusting car
Deflating a basketball
Tearing a piece of aluminum foil
Clouds forming in the sky
Baking cookies
Melting a sugar cube
A green leaf changes to red in the Fall
Yeast added to bread dough makes it rise
A juice box in the fridge freezes
Separating the salt from ocean water
Starfish opening a clam
Hot rising to form currents
which of these are Examples of Physical & Chemical Changes
Perfume evaporates into the air
Decomposer breaks down a dead tree
Peeling an orange
Rusting car
Deflating a basketball
Tearing a piece of aluminum foil
Clouds forming in the sky
Baking cookies
Melting a sugar cube
A green leaf changes to red in the Fall
Yeast added to bread dough makes it rise
A juice box in the fridge freezes
Separating the salt from ocean water
Starfish opening a clam
Hot rising to form currents
which of these are Examples of Physical & Chemical Changes
Answers
GPT-4o mini
To classify the items you've listed into physical and chemical changes, we can use the following distinctions:
- **Physical changes** involve a change in form or appearance but do not alter the substance's chemical composition.
- **Chemical changes** involve a transformation that results in the formation of new substances with different chemical properties.
### Physical Changes:
1. Putting makeup on your cheeks (change in appearance)
2. Peeling an orange (changes its form but not its composition)
3. Rusting car (chemical but also traditionally can be thought of as a system's physical state changing)
4. Deflating a basketball (change in size and form)
5. Tearing a piece of aluminum foil (change in shape)
6. Clouds forming in the sky (change in state of water but does not alter the chemical composition)
7. Baking cookies (primarily chemical, but visually it's also a change in state of ingredients)
8. Melting a sugar cube (change in state, physical change)
9. A juice box in the fridge freezes (change in state from liquid to solid)
10. Starfish opening a clam (action result, physical change)
### Chemical Changes:
1. Perfume evaporates into the air (physical change, change of state)
2. Decomposer breaks down a dead tree (chemical breakdown of organic material)
3. A green leaf changes to red in the Fall (chemical changes due to pigments changing)
4. Yeast added to bread dough makes it rise (fermentation, a chemical process)
5. Separating the salt from ocean water (could be physical if using evaporation here but typically refers to chemical compounding)
6. Hot rising to form currents (change in state and properties but also not altering chemical balance)
### Summary:
Many of these processes involve both physical and chemical changes, as certain actions can simultaneously reflect changes in physical properties while also involving chemical transformations.
More definite classification would rely on knowing if a substance is fundamentally changed or just altered in form or state. For the most part:
- **Mostly Physical**: Tearing aluminum foil, peeling, freezing juice, deflating a basketball.
- **Mostly Chemical**: Baking cookies, yeast rising bread, leaf pigment change.
Context can change the classification, particularly for things that seem to involve aspects of both changes simultaneously.
- **Physical changes** involve a change in form or appearance but do not alter the substance's chemical composition.
- **Chemical changes** involve a transformation that results in the formation of new substances with different chemical properties.
### Physical Changes:
1. Putting makeup on your cheeks (change in appearance)
2. Peeling an orange (changes its form but not its composition)
3. Rusting car (chemical but also traditionally can be thought of as a system's physical state changing)
4. Deflating a basketball (change in size and form)
5. Tearing a piece of aluminum foil (change in shape)
6. Clouds forming in the sky (change in state of water but does not alter the chemical composition)
7. Baking cookies (primarily chemical, but visually it's also a change in state of ingredients)
8. Melting a sugar cube (change in state, physical change)
9. A juice box in the fridge freezes (change in state from liquid to solid)
10. Starfish opening a clam (action result, physical change)
### Chemical Changes:
1. Perfume evaporates into the air (physical change, change of state)
2. Decomposer breaks down a dead tree (chemical breakdown of organic material)
3. A green leaf changes to red in the Fall (chemical changes due to pigments changing)
4. Yeast added to bread dough makes it rise (fermentation, a chemical process)
5. Separating the salt from ocean water (could be physical if using evaporation here but typically refers to chemical compounding)
6. Hot rising to form currents (change in state and properties but also not altering chemical balance)
### Summary:
Many of these processes involve both physical and chemical changes, as certain actions can simultaneously reflect changes in physical properties while also involving chemical transformations.
More definite classification would rely on knowing if a substance is fundamentally changed or just altered in form or state. For the most part:
- **Mostly Physical**: Tearing aluminum foil, peeling, freezing juice, deflating a basketball.
- **Mostly Chemical**: Baking cookies, yeast rising bread, leaf pigment change.
Context can change the classification, particularly for things that seem to involve aspects of both changes simultaneously.