When a chocolate bar is broken into two pieces, what type of change occurs?

• A chemical change

• A new substance is created

• A physical change

• A state change

What defines a physical change in matter?

• A new substance is formed.

• The matter changes size, shape, or state but remains the same substance.

• The matter undergoes a chemical reaction.

• The matter completely disappears.

When water freezes into ice, what happens to the water?

• It becomes a new substance.

• It undergoes a chemical change.

• It remains water, but changes its state.

• It evaporates.

Why is mixing peanuts, raisins, and chocolate chips to make trail mix considered a physical change?

• A new food substance is created.

• The ingredients chemically react with each other.

• Each ingredient keeps its original properties.

• The mixture cannot be separated.

Which of the following physical changes is generally considered reversible?

• Breaking a window

• Crumpling paper

• Melting an ice cube

• Slicing bread