What type of change does not alter the chemical composition of a substance?

• None of the above

• Biological change

• Physical change

• Chemical change

What is an example of a physical change?

• Burning wood

• Rusting of iron

• Boiling water

• Mixing acid and base

What does not change in a physical change?

• Volume

• Temperature

• Physical appearance

• Chemical composition

What happens to the particles in a substance when it changes from liquid to gas?

• They move closer together

• They move farther apart

• They bond chemically

• They disappear

Which type of mixture can still have its components physically separated?

• Homogeneous mixture

• Heterogeneous mixture

• Compound

• Solution

What does the separation of a homogeneous mixture typically require?

• A change in physical state

• Simple filtration

• No separation is possible

• Magnetic attraction

What is produced when vinegar reacts with baking soda?

• No reaction

• A liquid

• A gas

• A solid

What is the result of combustion?

• Change in color only

• Temporary change in state

• Formation of a new substance

• Physical separation of components

What is a key characteristic of a chemical change?

• It can be easily reversed

• It changes the state of matter

• It produces a new substance

• It involves physical separation

Which process involves a chemical change?

• Dissolving sugar in water

• Slicing bread

• Fermenting milk

• Melting ice