sturcture of the universe Flashcards
(14 cards)
from smallest to largest what is the structure of the universe
asteroid
comet
moon
planet
star
solar system
galaxy
universe
what type of orbit do comets have
elliptical orbits
what does gravity do in terms of orbit
keeps things in orbit
what is the difference between mass and weight
mass is how much matter there is in an object (KG)
weight is the force of gravity acting on a mass (N)
what is gravitational field strength of the earth
10 N/Kg
(10N per Kg)
what is the most abundant element in the universe
hydrogen
what is a nebula
cloud of gas and dust
how does a star form
a nebula collapses under gravity until the centre is hot enough for nuclear fusion to occur and this is how stars create light
what is life cycle for star around same size as the sun
nebula
protostar
main sequence
red giant
white dwarf
black dwarf
what is life cycle for star much larger than the size as the sun
nebula
protostar
main sequence
red super giant
supernova
black hole OR neutron star
what stage does a star fuse hydrogen into helium
main sequence
why does a star stop fusing hydrogen into helium after a long time
runs out of hydrogen
at what stage does a star fuse helium
red giant
what is order of star colour from hottest to coolest
blue
white
yellow
orange
red
