Astrophysics and Cosmology Physics Alevel

Which of the following is the largest?

• Planet

• Galaxy

• Satellite

• Comet

• Star

Tags

NGSS.MS-ESS1-3

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

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

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

Tags

NGSS.HS-ESS1-1

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

Tags

NGSS.MS-ESS1-3

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

Tags

NGSS.MS-ESS1-3

Which of the following are evidence for the big bang?

• Cosmic microwave background radiation

• Doppler effect

• Static electricity

• Isotropic

Tags

NGSS.HS-ESS1-2

What is the definition of isotropic?

• bright in one direction, but not the other

• Homogenous

• Uniform density

• Same in all directions