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Space and radiation

QuestionAnswer
What charge does beta radiation have? Minus 1
What charge does alpha radiation have? +2
What does light-year mean? The time it takes light to travel in a year
What is the role of the moderator and control rods? They control the rate of reaction in the core of the nuclear reactor
What is the role of the moderator? The moderator slows down fast moving neutrons to enable absorption by E.G uranium 235 nuclei to a occur
What do the control rods absorb? The control rods are neutron absorbing rods which are inserted into spaces between the fuel rods
What is nuclear fission? Nuclear fission is the splitting of an unstable nucleus
What is released from the fission process which needs to be slowed down so fission can continue? Neutrons
What was our solar system created from? Remains of previous stars supernova
What will stars SIMILAR size to our sun form into when it collapses under it’s own pressure ? White dwarf
What comes after white dwarf for stars similar sizes to our sun? Black dwarf
Wha twill happen to stars at a red supergiant stage do? They shrink and explode into a supernova
What happens at stage one of the life cycle of a star? Gravity pulls particles together and a protostar is formed
What happens at stage 2 of the life cycle of a star? Gravity and pressure balance and hydrogen nuclei fuse together to make helium nuclei. MAINSEQUENCE
What happens when hydrogen starts to run out in stars similar size to our sun? Radiation pressure increases and becomes bigger than gravitational force so star expands to become red/blue giants.
Created by: Louisw10
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