Irreversible/Reversible Changes

What is the reaction of oxygen in air?

• Rusting

• Dissolving

• Cooking

• Burning

These changes cannot be changed back

• Reversible

• Irreversible

What are the three ways to speed up dissolving?

• Boiling, Heating, Crushing

• Heating, Stirring, Boiling

• Stirring, Heating, Crushing

This is when a solid changes to a liquid

• Melting

• Evaporation

• Freezing

• Boiling

What are the names of the ways a liquid changes to a gas (choose two)?

• Melting

• Boiling

• Evaporation

• Condensation

This is a solution that cannot dissolve any more solids

• Solvent

• Solute

• Saturated

• Solution

This is the liquid that you use for dissolving:

• solvent

• solute

This is the solid that you used for dissolving.

• solvent

• solute

Of the changes below, which is NOT an irreversible change:

• rusting

• cooking

• melting

• burning

Choose the TWO reversible changes:

• condensing

• rusting

• freezing

• cooking