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Stars - Coggle Diagram
Stars
Fission
A U-235 atom can be hit with a neutron, setting off a chain reaction of divisions of atoms, equating in two daughter atoms and a small number of neutrons that can set off another atom
Control rods, are made of boron or cadmium, absorb neutrons as to regulate the rate of reaction.
Moderators, made of graphite, absorbs K.E of neutrons, as to have more successful collisions
Shielding, is a concrete layer around the reactor and stops radiation leaking from the reactor.
Gravity and orbits
Gravity varies on different planet due to the mass of the planet, as well as the planetary radius
Gravity causes satellites and planets to orbit, as they are attracted to the mass, and are moving at an equilibrium speed, which keeps them moving around the mass.
Moons orbit circularly, planet orbit in slight ellipses and comets orbit in large ellipses
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Stars
Stars can be classified by colour, which is related to their surface temperature
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B, light blue, 10,000- 30,000K
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Fusion
Fusion is the combining of atoms to make bigger ones, where mass is lost in the system, and energy is extracted
Fusion doesn't happen at low temperatures or pressures, due to the electrostatic repulsion of protons