In class, we have been talking about reversible and irreversible changes. A reversible change is when something can go back to how it was before; for example putting sand in a glass of water is a reversible change because we can boil the water to take the sand out. An irreversible change is when something can't go back to how it was before; for example when we cook popcorn, once the kernals are popped they can't go back to being un-popped.
This link will take you to a website where you will be able to quickly explore mixing objects. This will help you to reinforce your knowledge before you take the quiz.
http://sciencekids.co.nz/gamesactivities/reversiblechanges.html
Once you are confident in understanding all of what we have learnt, make sure you take the practice test on the top right-hand side of this page. If you can answer 3 questions correctly, you're ready to take the quiz!
It is not a timed quiz, so you can take as long as you like, but you are not allowed to use other sources to give you the information.
Find a quiet spot where you can concentrate and when you are ready, click the link below.
