Please help I'm confused. While preparing his garden for spring planting, Brian grabs a shovel that was left outside all winter. He notices its metal component is covered in a red substance. What question can Brian ask to determine if the red substance indicates a chemical or physical reaction?

Was it in the ground or on the ground?

Explanation:

He should ask that because the red substance could be rust and if it was left in the ground then it wasnt left out so oxygen couldnt get at it so it  

COMPOSITION  

Explanation:

The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change.

Is there any difference in the appearance, smell, or simple display of a sample of matter without a change in composition?

може ли да зареждате повече информация, моля