1. Rusting Iron
This is a chemical change because the rust is a chemical forming on the iron. It's not a physical change because it does not physically change the shape of the iron.
2. Burning Wood
This is a chemical change because the fire breaks down the wood. It does change the shape physically, but is still a chemical change because it breaks it down by a chemical force and not a physical force.
3. Cooking an Egg
This changes the chemical state of the egg. It does not change the physical state.
4. Baking a cake
When you bake a cake you are chemically changing the state of the batter into a more solid figure. it just so happens to change the physical shape of it too.
5. Rotting Bananas
The chemical change in a rotting banana is the chemicals breaking down the flesh of the banana. The chemicals come from the air and get in the banana.
This is a chemical change because the rust is a chemical forming on the iron. It's not a physical change because it does not physically change the shape of the iron.
2. Burning Wood
This is a chemical change because the fire breaks down the wood. It does change the shape physically, but is still a chemical change because it breaks it down by a chemical force and not a physical force.
3. Cooking an Egg
This changes the chemical state of the egg. It does not change the physical state.
4. Baking a cake
When you bake a cake you are chemically changing the state of the batter into a more solid figure. it just so happens to change the physical shape of it too.
5. Rotting Bananas
The chemical change in a rotting banana is the chemicals breaking down the flesh of the banana. The chemicals come from the air and get in the banana.
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