Chemical and Physical Change Quiz

What is the definition of a chemical change?

• A change that only affects the physical appearance of a substance

• A process in which one or more substances are converted into different substances with different properties.

• A change that does not involve the formation of new substances

• A change that occurs when a substance changes state from solid to liquid

Give an example of a physical change.

• Boiling of water

• Burning of wood

• Rusting of iron

• Melting of ice

What are the properties of a physical change?

• Are usually irreversible

• Do not alter the chemical composition of a substance and are usually reversible

• Do not affect the physical state of a substance

• Changes the chemical composition of a substance

What are the different states of matter involved in physical changes?

• solid, liquid, and gas

• hot, cold, and warm

• round, square, and triangle

• fast, slow, and medium

How is a chemical change different from a physical change?

• Chemical change involves the change in state of matter.

• Chemical change involves the formation of new substances.

• Chemical change does not involve the formation of new substances.

• Chemical change is reversible.

Name a chemical change that occurs in everyday life.

• Burning of wood

• Boiling water

• Mixing salt and sugar

• Cutting paper

Explain the concept of conservation of mass in chemical changes.

• The mass of the products is always greater than the mass of the reactants

• Total mass of the reactants must equal the total mass of the products

• The mass of the reactants decreases in a chemical change

• The conservation of mass only applies to solid substances

List three examples of physical changes in matter.

• Melting, freezing, and evaporating

• Burning paper

• Baking a cake

• Mixing salt in water

What happens to the chemical composition during a chemical change?

• It remains the same

• It changes

• It disappears

• It becomes invisible

How can you reverse a physical change?

• By asking someone else to reverse the change

• By ignoring the change and pretending it didn't happen

• By applying the opposite conditions or processes that caused the change

• By repeating the same conditions or processes that caused the change