1) The size of gravitational force depends on the distance between the objects and... a) Mass of the object b) Size of the object c) Weight of the object d) Distance from the sun 2) Shape of the orbit of a comet a) Circular b) Square c) Eliptical d) Straight 3) What does "T, time period" mean in the equation v = 2πr/T? a) Time to rotate on axis b) Time to do one complete orbit c) Time to make one complete wave d) Time to have one whole day. 4) What is absolute magnitude? a) How much energy is emitted from a star per second b) Brightness of a star at a standard distance c) How bright a star looks from Earth d) The stage of a star's lifecycle 5) Which sequence appears in the life cycle of a star of a similar size to the sun? a) Stellar nebula → black dwarf → red giant b) Planetary nebulla → white dwarf → main stable period c) Protostar → stellar nebula → black hole d) main stable period → red super giant → white dwarf 6) In a Hertzsprung-Russell diagram, what label goes on the x axis? a) Colour b) Absolute magnitude c) Luminosity d) Life cycle 7) In a Hertzsprung-Russell diagram, what label goes on the y axis? a) Colour b) Absolute magnitude c) Luminosity d) Life cycle 8) What does red-shift indicate? a) A galaxy is moving closer to us b) A galaxy is moving further away from us c) A galaxy is spinning d) A galaxy is staying still 9) What statement is TRUE of CMBR? a) The waves are x-rays b) The waves are slower than the speed of light c) The waves only come from one direction d) The wavelength increased 10) What is the final stage in the life cycle of a very large star? a) Neutron star b) Black dwarf c) Black hole d) White dwarf

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