Physical and Chemical Sciences

Select the answer that best describes a reversible change

• When a new substance is formed.

• A change which cannot be undone or reversed.

• When a change is made to a substance, but it can be changed back to its original state.

• All of the above.

Select the answer that best describes an irreversible change

• When a substance can be changed back or reversed.

• When a substance is changed, and it cannot be changed back.

• When a new substance is formed.

• All of the above.

Burning a piece of paper is an example of...

• Reversible Change

• Irreversible Change

Melting wax is an example of...

• Reversible Chnage

• Irreversible Change

Melting chocolate is an example of...

• Reversible Change

• Irreversible Change

Burning toast is an example of...

• Reversible Change

• Irreversible Change

Which of the following is an example of a reversible change?

• A puddle turns to ice on a very cold winter's day

• A bicycle left out in the rain begins to rust

If you spilled nails in a sandbox, what separation tool/method could you use to clean out the sandbox so it would be safe for children to play in?

• filter

• magnet

• screen

• evaporation

Which of the following objects are soluble in water?

• sand

• oil

• iron fillings

• sugar

A solution is a mixture of one or more substances _________ evenly into another substance.

• carried

• split

• dissolved

• evaporated