Chemical And Physical Change In Chemistry Examples Quiz

Cutting a piece of cork in half alters its physical form without changing its chemical composition, making it a physical change.

Evaporation of water into steam is a physical change because it does not involve any change in the chemical composition of the substances involved. It is a change in the physical state of water from liquid to gas.

Food is chemically broken down in the stomach through the action of gastric juices, including hydrochloric acid and enzymes. The stomach plays a crucial role in the digestion process.

Baking a pie involves a chemical reaction between the ingredients, resulting in a new substance with different properties. This is why it is classified as a chemical change.

Slicing an orange involves changing the physical appearance and state of the orange without altering its chemical composition, which is why it is considered a physical change.

Blowing soap bubbles is a physical change because it involves a change in the state of matter without altering the chemical composition of the soap molecules.

When sugar dissolves in water, it undergoes a physical change as its state changes from solid to liquid without altering its chemical composition.

Rusting of metal involves a chemical reaction between the metal and oxygen in the presence of moisture, resulting in the formation of a new substance (rust). This process is an example of a chemical change.

Burning paper involves a chemical reaction where the paper is being oxidized, leading to the formation of new substances. This is a characteristic of a chemical change.

Grinding peanuts to make peanut butter is a physical change because it does not change the chemical composition of the peanuts, only their physical state.

When milk turns sour, it undergoes a chemical change due to the reaction of bacteria consuming lactose and producing lactic acid, changing its chemical composition.

When a candle burns, it undergoes a chemical reaction where the wax and oxygen combine to form new substances such as carbon dioxide and water vapor. This is an example of a chemical change.

Chopping wood involves breaking down the physical structure of the wood without altering its chemical composition, making it a physical change.

Cutting paper is considered a physical change because the paper is physically altered in size or shape, but its chemical composition remains the same.

Melting butter on a corn is a physical change because it is a reversible change in the state or form of matter without any change in its chemical composition.