Physical change vs chemical change

Which answer makes a correct statement?

• Physical change only changes the size.
• Physical change only changes the color.
• Physical changes begin and end with the same matter.
• Physical changes change the matter into something total different.

What happens when a piece of wood burns?

• A physical change takes place.
• A chemical change takes place.
• The wood loses its gravity.
• The wood loses its inertia.

Is spoiling food a physical or chemical change?

• phyiscal
• chemical

Cutting your hair?

• Physical Change
• Chemical Change

Rotting bananas?

• Physical Change
• Chemical Change

Melting of Wax

• Chemical Change

• Physical Change

• All of these

• None of these

When a liquid becomes a solid, freezing occurs.

• True

• False

Expansion on heating and contraction on cooling of metals is a

• Chemical Change

• Physical Change

• Irreversible change

• Reversible change

Conversion of milk to curd involves (choose all that applies)

• Change in color

• Change in taste

• Milk changes from liquid to semi-solid

• Irreversible change

A chemical change may involve

• Change in color only

• Change in temperature only

• Evolution of gas only

• Any or all of the above