Exploring Chemical Changes Quiz

Which of the following is a sign of a chemical reaction?

• Change in shape

• Change in color

• Change in size

• Change in state

Which of the following is a physical change?

• Rusting of iron

• Baking a cake

• Freezing water

• Burning a candle

In a chemical reaction, the mass of the reactants is equal to the mass of the products. What is this principle called?

• Law of Gravity

• Law of Conservation of Mass

• Law of Motion

• Law of Energy

Which of the following is an example of a chemical reaction?

• Mixing sand and water

• Boiling water

• Baking soda reacting with vinegar

• Cutting a piece of paper

Which of the following is NOT a sign of a chemical reaction?

• Formation of a gas

• Change in temperature

• Change in state

• Formation of a precipitate

Which type of chemical change involves a substance combining with oxygen to produce heat and light?

• Decomposition

• Combustion

• Synthesis

• Neutralization