Question

1. which of the following is a chemical reaction involving grass? a cow grinding grass between its teeth. a patch of grass turning yellow due to lack of sunlight. a lawn mower mulching the clippings, depositing the nutrients back to the soil. digging a hole in the lawn.

Explanation:

A chemical reaction results in a change of the chemical composition of substances. A cow grinding grass is a physical change. Mowing and digging are also physical changes. A patch of grass turning yellow due to lack of sunlight involves chemical - changes in the chlorophyll and other pigments in the grass cells, which is a chemical reaction.

Answer:

A patch of grass turning yellow due to lack of sunlight.