GEOLOGY

EARTH SCIENCE

MAGNETISM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the best reason for how we know digesting food is a chemical change?
A
because it causes you to burp
B
because you can feel the gases in your stomach
C
acids break down food and creates gas and new substances
D
because it goes in as food and comes out as something else
Explanation: 

Detailed explanation-1: -Food digestion is a chemical change. In this process, large macromolecules are broken down into smaller molecules. It is done by the enzymes found in the stomach and intestines.

Detailed explanation-2: -During the process of digestion, the food is broken down into smaller molecules. The salivary glands present in our mouth help in the breakdown of the food. In this process, there is a formation of a new substance. Therefore, it is considered to be a chemical change.

Detailed explanation-3: -Digestion of food is a chemical change because the large macromolecules are broken down into simpler molecules by the enzymes present in the stomach and the intestines. It is a chemical change because it involves various chemical reactions. Hence the answer is chemical change.

Detailed explanation-4: -The stomach lining produces strong digestive juices. These create chemical reactions in the stomach, breaking down and dissolving its nutrients.

Detailed explanation-5: -Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.

There is 1 question to complete.