CERN Large Hadron Collider

What is the circumference of the LHC?

• 57.9 metres

• 12.9 km

• 27 km

Why did they make the LHC so large?

• Nobody knew how big to make it, so they just guessed

• The tunnel was left over from an old particle accelerator.

• The circumference in km is a lucky number in Switzerland where it was built.

What does CERN stand for?

• the Center for Energy, Radiation and Nuclear Study

• the European Organization for Nuclear Research

• the Center for European Research and Negotiations

Where does the LHC get all the protons that go zipping around?

• from Oxygen

• from Hydrogen

• from Helium

What does NOT happen to particles before they go into the LHC?

• The electrons are stripped.

• The protons are fed into preliminary accelerators.

• The particles are cleaned and rinsed.

What happens when the protons smash together?

• It happens so rarely, we don't really know.

• Makes a black hole.

• Makes a mini Big Bang.

Huge magnets inside the LHC help steer the protons beam. Are the magnets hot or cold?

• They get really hot.

• They are really cold.

What were scientists NOT looking for in the LHC?

• superpartners

• black holes

• Higgs Boson

What CANNOT be discovered at the LHC?

• string theory

• supersymmetry

• how particles gain mass

How many proton collisions occur each second in the LHC when it is running?

• There are only a couple every few months!

• 450

• 600 million