D2 - Stellar Fusion

This is the final stage of the

• triple alpha process

• proton - proton chain

• CNO cycle

• r process

What are the two missing products in this stage of the proton-proton chain?

• positron and electron- neutrino

• positron and tau-neutrino

• anti-electron and electron-neutrino

• electron and electron- neutrino

What's the net product of the CNO cycle?

• Nitrogen

• Hydrogen

• Carbon

• Helium

Which Stars are likely to undergo the CNO cycle?

• Stars more massive than the Sun

• Black holes

• Stars at higher temperatures than the Sun (core temperatures of above 20000000K)

• Neutron stars

What's the missing product in this starter stage of the CNO cycle?

• Gamma

• Hydrogen

• EM radiation

• Helium

What type of Stars produce Helium via the proton-proton chain and CNO cycle?

• Black holes

• Neutron stars

• White dwarfs

• Massive Main sequence stars

What are the final products of this triple alpha process?

• Helium and 3 protons

• Hydrogen and 3 neutrons

• Oxygen and EM radiation

• Nitrogen and beta particles

Which type of Stars may undergo the triple alpha process?

• Red giants

• Brown dwarfs

• Stars of more than about 8 solar masses up to a certain limit.

• Neutron stars

Can super massive stars fuse to produce elements heavier than iron?

• yes

• no

What describes this diagram?

• A fully evolved massive star

• A massive 'onion shaped' star with element layers of outwardly decreasing atomic numbers

• A massive star at the end of its nuclear fusion (at its core)

• A massive star that will soon explode in a SUPERNOVA