Test Review- Physical/Chemical changes, and atoms

In making a pizza, which process involves a chemical change?

• mixing the spices for the sauce

• spreading the cheese

• slicing pepperoni for the topping

• baking the crust

Is ripping paper a physical or chemical change?

• physical

• chemical

• neither

• both

Is melting chocolate a physical or chemical change?

• physical

• chemical

• neither

• both

Which statement is TRUE about a physical change?

• New matter is made.

• The appearance changes.

• Bubbles are released.

• The atoms rearrange.

Two clear liquids are mixed together in a test tube. A cloudy white solid appears. This substance is called ___.

• a change in state.

• a precipitate.

• a reactant.

• malleable.

Martin decides to cook breakfast for his family. Which part of his preparation is a chemical change?

• Mixing the pancake batter

• Melting butter in the pan

• Cooking the eggs

• Slicing the strawberries

Jada makes a pitcher of tea and adds sugar. As she stirs, the sugar dissolves. Which type of change is dissolving the sugar?

• physical

• chemical

• both

• neither

Zoe is recording observations in her science notebook. Which set of observations would indicate a chemical change has occurred?

• Different size, new state of matter

• The substance evaporated.

• The substance dissolved and the mixture became cloudy.

• New color, gas produced, temperature decreased

Which example is a chemical change?

• bending

• boiling

• burning

• breaking

A physical change can sometimes result in a color change. Which of the following situations shows this?

• Milk turns yellow when it spoils.

• Dough becomes darker when it's baked into a cake.

• A red candy dissolves and turns water pink.

• A match turns black when it's burned.