Perubahan Fisika dan Kimia

What is a physical change?

• A physical change alters the chemical structure of a substance.

• A physical change is a change that does not affect the chemical composition of a substance.

• A physical change involves a reaction that produces new substances.

• A physical change is a change that affects the mass of a substance.

Give an example of a physical change.

• Dissolving sugar in water

• Rusting of iron

• Burning wood

• Melting ice into water

What is a chemical change?

• A chemical change does not affect the composition of substances.

• A chemical change is a process that results in the formation of new chemical substances.

• A chemical change involves only physical alterations.

• A chemical change is a reversible process.

Provide an example of a chemical change.

• Rusting of iron

• Boiling water

• Dissolving sugar in water

• Melting of ice

What are the characteristics of a physical change?

• Only changes in color are considered physical changes

• Physical changes are irreversible

• Characteristics of a physical change include: no new substances formed, often reversible, and changes in state, shape, or size.

• New substances are always formed

List two signs of a chemical change.

• Formation of a solid

• Change in temperature

• Change in mass

• Change in color, production of gas

How does temperature affect physical changes?

• Temperature changes always result in a solid state.

• Temperature has no effect on physical changes.

• Temperature only affects chemical changes, not physical changes.

• Temperature affects physical changes by altering the energy and movement of particles, leading to changes in state and solubility.

What happens to the chemical composition during a chemical change?

• The chemical composition changes as new substances are formed.

• Only the physical state of the substances changes, not the composition.

• The chemical composition remains unchanged throughout the process.

• The chemical composition is reversed to its original state.

Can physical changes be reversed? Why or why not?

• Yes, physical changes can only be reversed under specific conditions.

• No, physical changes cannot be reversed at all.

• Yes, physical changes can often be reversed.

• No, physical changes are permanent and irreversible.

What are some common examples of physical changes in everyday life?

• Slicing bread

• Burning wood

• Melting ice, boiling water, dissolving sugar, chopping vegetables, breaking glass.

• Freezing water