Using Science to Understand our World- Reversible and Irreversible Changes

In class we have been learning about matter. We have learned that all things can be classified into 5 states of matter: solids, liquids, gases, plasma and Bose-Einstein Condensates. All things are built of molecules, made up of atoms and bonds; we made some of these using marshmallows! Molecules can be tasty!

Now we are learning about physical and chemical changes. Physical changes are reversible. They occur when the change can be reversed because the molecules haven't actually been changed. Chemical changes happen the molecules are actually changed and the changes are irreversible.

Have a look at these two BBC School Science Clips to gain a better understanding!

When you have finished, add a comment to tell us what you have learned.