1) What is an alpha particle made of? a) A fast moving electron b) A neutron c) A high frequency wave d) A helium nucleus 2) Which best describes gamma radiation? a) A fast moving particle b) A high frequency wave c) A low frequency wave d) An energetic ray 3) What causes the emission of alpha, beta and gamma radiation? a) Excitation of electrons b) De-excitation of electrons c) Nuclear instability d) Oscillating electrical currents 4) What name is given to the high-energy protons and atomic nuclei which rain down on Earth from space? a) Solar Wind b) Cosmic Rays c) Nuclear Wind d) X-Ray Jets 5) Which of these is the atomic symbol for alpha decay? a) b) c) d)

Radioactivity

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