A1+ PREKET 1 - REVERSIBLE AND IRREVERSABLE CHANGES

What happens to the ice cubes when people place them in the sun for 5 minutes?

• they melt

• they dissappear

• they get frozen

• they stop melting

What makes substances change?

With Reversible changes , materials ......return to their original shape or state.

• can

• can't

With ................changes, materials can't return to their original shape or state.

• reversible

• irreversible

Which changes cause a new substance to form?

• reversible changes

• irreversible changes

when you burn a wooden match, what new substance does the wooden match turn into?

Which changes can't be reversed or changed back to their original state?

Which changes are reversible ?

• frying of eggs

• burning of wood

• melting of chocolate

• cutting of fruits

• boiling of water

What is made up of two or more different substances mixed together

How many substances do we need to make up a mixture?

• one

• two

• three

• all of the options