Will any of these properties change after a couple hours in the sun?

you didnt show a picture, but if it just exposed then it will probably be a physical change

Explanation:

fire could start, buildings collapsing, and ash falling from the sky.

explanation:

this is because the buildings or plants could catch on fire and the buildings would most likely collapse. lastly ash would fall because all the burning would cause ash to fall from the sky.

hope this .