Read the following scenarios and use a P to indicate if a physical change has occurred or a C to note if a chemical change has occurred.
a.) _______ A block of solid water is placed on a table. Soon it changes into a puddle. After two hours, the puddle is gone.
b.) _______ Two unknown chemicals are mixed; heat and a gas are given off.
c.) _______ A bicycle is kept outside against a house; soon, visible spots of rust can be seen.
d.) _______ A solid is crushed into a powder.
e.) _______ Two unknown substance are mixed together; light is produced after they are mixed.
f.) _______ A piece of sodium (Na) is placed on a block of ice; as the ice melts, smoke, fire, and bubbles form on the surface of the ice.
g.) _______ Salt and pepper are mixed in one shaker.
h.) _______ Chocolate syrup is mixed in milk to make chocolate milk.
i.) _______ A marshmallow is roasted over a fire.
j.) _______ Before it is roasted, a marshmallow is cut in half.