For each item, choose whether the change is a physical change or a chemical change. exploding firecracker:
mowing grass:
breaking a window:
spreading butter on toast:
burning wood in a fireplace:
acid rain corroding gravestones:

Explanation:

Exploding Firecracker -  Chemical Change

Mowing Grass  -  Physical Change

Breaking a Window -  Physical Change

Spreading butter on toast - Physical Change

burning wood in a fireplace - Chemical Change

acid rain corroding gravestones:   Chemical Change

In a physical change, the chemical composition is not altered, easily reversible and no new substance is formed.

In a chemical change, the chemical composition of the substance is altered. Not reversible and a new substance is always formed at the end of the reaction.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.