The referendum or even THE idea that the UK will leave the EU is sometimes called Brexit; this is made up from two words Britain and Exit.
Some people have introduced the term ‘Bremain’ which is made up from Britain and Remain.
We are having a referendum because the Conservative Party promised it if it won the 2015 UK general election.
Before having the referendum the Prime Minister made some changes to the UK membership rules:
People across Europe vote directly for their own MEP’s (MEP = Member of the European Parliament).
There are currently 751 seats within the European Parliament which is elected every five years.
The European Parliament has very few powers:
Image: European Parliament Strasbourg Hemicycle - Diliff © Wikimedia Commons under Creative Commons Attribution-Share Alike 3.0 Unported
The Council of Europe is made up of the Heads of States (like our Prime Minister) of each member country.
The Council of Europe has no formal powers but is hard to ignore because it is made up of the 28 Prime Ministers and Presidents.
It can also request legislation from the European Commission just like the European Parliament.
The European Commission is made up of 28 members (one from each member country) appointed by the National Government of each country.
The Commission is responsible for the day to day running of the EU just like the Cabinet Governments of Wales and the UK.
Nearly all powers and the power to start legislation are reserved for the commission.
Most of the power therefore in the EU comes directly from the Heads of State of the member states; either directly or by the European Commissioner that they appoint to the Commission.
Use a mind map type of diagram to show who has the most power in the EU.
Another issue you may find of interest, Investigating The Welsh Government Elections 2016.