science y6

Which is a way that a piece of paper can go through a chemical change?

• fold the paper in half
• soak the paper in water
• burn the paper with fire
• cut the paper with scissors

Which of these is an example of a new substance being formed?

• a nail rusting
• a wall being painted
• water changing to steam
• paper being folded

Which best describes a chemical change in paper?

• filing paper
• mailing paper
• burning paper
• cutting paper in half

Which is an example of a chemical change?

• baking a cake
• freezing water
• crushing a can
• breaking an egg

Which example best describes a physical change?

• iron rusting
• charcoal burning
• an ice cube melting
• a marshmallow burning

Which statement best describes why baking a cake is an example of a chemical change?

• The process takes place in an oven.
• The process requires heat energy.
• The process cannot be reversed.
• The process can be repeated.

Ice melting

• Chemical Change
• Physical Change

A ______ change can be undone and generally refers to a change of state.

• Reversible

• Irreversible

An _______ change cannot be undone because the change is permanent and generally creates a new substance.

• Reversible

• Irreversible

Reversible changes are also called

• Physical changes

• Chemical changes