WorksheetsAstrophysics and Cosmology Physics Alevel
Total questions: 12
Worksheet time: 6mins
Which of the following is the largest?
Planet
Galaxy
Satellite
Comet
Star
Which of the following is the largest?
Parsec
Lightyear
Astronomical Unit
1 billion Kilometers
'Spectrum of frequencies emitted due to electron transitions from a higher energy level to a lower one' is the definition of which key term?
Continuous spectrum
Absorption spectrum
Transition spectrum
Emission spectrum
Which is the correct order for a star's life cycle?
Main sequence -> red dwarf -> white dwarf
Protostar -> main sequence -> neutron star -> Red giant
Main sequence -> red giant -> supernova -> neutron star
Red giant -> supernova -> white dwarf -> black dwarf
What is the reason a Main sequence star is so stable?
The number of atoms remain the same
The radiation pressure balances the pressure of weight
Magnetic forces within it hold it together
It has plenty of emotional support from it's friends
What do we call the point which determines whether a star will become a white dwarf, or a supernova?
Degeneracy limit
Hertzsprung-Russel constant
Supernova determination constant
Chandrasekhar limit
what is the approximate radius of the earth?
6.5 x 103 m
6.5 x 106 m
6.5 x 109 m
6.5 x 108 m
What is a comet?
Large rocky ball of ice that orbits the sun
Cluster of billions of stars
Lumps of rock or iron that orbit the sun
Minor planets
Which of the following are evidence for the big bang?
Cosmic microwave background radiation
Doppler effect
Static electricity
Isotropic
What is the definition of isotropic?
bright in one direction, but not the other
Homogenous
Uniform density
Same in all directions
Which of these is not an option for the eventual fate of theh universe?
Open universe
Shut universe
Flat universe
Closed universe
what percentage of the universe do scientists predict dark energy to occupy?
52%
68%
75%
89%
