Front

What is one example of a chemical change in food preparation?

Back

Cooking an egg is a chemical change because the heat changes the proteins' structure, creating a new substance.

Front

Why is combustion considered a chemical change?

Back

Combustion is a chemical change because it produces new substances like carbon dioxide and water through burning.

Front

What happens during the process of digestion?

Back

Digestion involves chemical changes as enzymes break down food into new molecules the body can absorb.

Front

Is photosynthesis a chemical change?

Back

Yes, photosynthesis is a chemical change because plants convert water and carbon dioxide into glucose and oxygen.

Front

What chemical change occurs when baking soda reacts with vinegar?

Back

The reaction produces carbon dioxide gas, water, and sodium acetate, demonstrating a chemical change.

Front

Why is souring milk a chemical change?

Back

Souring milk is a chemical change because lactic acid bacteria produce new substances, changing its composition.

Front

What is a precipitate, and why is its formation a chemical change?

Back

A precipitate is a solid that forms during a chemical reaction, indicating the creation of a new substance.

Front

Is oxidation of metal a chemical change?

Back

Yes, oxidation, like rusting, is a chemical change as metal reacts with oxygen to form a new substance, such as iron oxide.

Front

Why is the decomposition of hydrogen peroxide a chemical change?

Back

Decomposition of hydrogen peroxide is a chemical change because it breaks down into water and oxygen gas, forming new substances.

Front

How does rotting food represent a chemical change?

Back

Rotting food is a chemical change because microorganisms break it down, producing new substances like gases and organic matter.