Question

Please answer only if you know the answer...please don't fr ea king give copy paste answer from internet...

1.) How is digestion of food a Chemical change?

2.) How do we know that a Chemical change has taken place? ​

Answer 1

Answer:

1.Digestion is considered a physical and chemical change because enzymes in the stomach and intestines break down large macromolecules into simpler molecules so that the body can more easily absorb the food. ... So, water freezing to ice or boiling to steam is a physical change, not a chemical one.

2.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

Answer 2

Answer:

1)Food digestion is considered a chemical change because enzymes in the stomach and intestines break down large macromolecules into simpler molecules so that the body can more easily absorb the food. In physical digestion, your body mechanically breaks down food, grinding or smashing it into smaller pieces.

2)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.