A man makes breakfast. He puts some toast in the toaster, and mixes some eggs with a little milk in a bowl. As he begins cooking the eggs, he smells the toast burning. He takes the toast out of the toaster and puts some butter on it, which melts. Finally, he pours some orange juice through a strainer to remove the pulp. He eats the meal, and he digests it as he drives to work in his car.
Which option correctly identifies a chemical and a physical change in the scenario?
A chemical change in the scenario is when the butter melts on the toast. The physical change in the scenario is when the man pours the orange juice through a strainer to remove the pulp.
In the given scenario, the correct identification of a chemical change and a physical change is as follows:
1. Chemical change: The toasting of the bread refers to a chemical change. When the bread is exposed to high heat, the process of toasting causes a chemical reaction known as the Maillard reaction, which changes the color, texture, and flavor of the bread.
2. Physical change: The melting of the butter is an example of a physical change. The change of state from solid to liquid, in this case, is purely physical, as the butter still retains its chemical composition.
It is worth noting that the digestion of food and the process of driving the car mentioned in the scenario are not chemical or physical changes relevant to the given context.