2. Radiation from the Sun is mainly in which regions of the E.M. spectrum?
A. microwave, infrared and visible
B. infrared, visible and ultraviolet
C. visible, ultraviolet and X-rays
D. infrared, ultraviolet and X-rays
3. The Sun is currently in the 'main sequence of its evolution'. What will happen to the Sun immediately after it evolves beyond this stage?
A. It will become a black hole.
B. It will become a red giant.
C. It will become a white dwarf.
D. It will become a black hole.
4. Very large stars will eventually expand and explode. This explosion is called...
A). a supernova.
B). a quasar.
C). a neutron star.
D). a solar flare.
5. Which of these are possible final stages for a massive star, with a mass much larger than the Sun?
A). White dwarf or black hole.
B). Neutron star or planet.
C). Neutron star or black hole.
D). White dwarf or planet.
6. In billions of years time, the Sun will no longer have the elements required for fusion reactions and will be a very small and dense object, but still very hot.
What is this stage called?
A. A nebula.
B. A neutron star.
C. A supernova.
D. A white dwarf.
7-10. The paragraph below describes the evidence for the 'Big bang'.
What are the missing words/phrases?
Astronomers have found that for measurements taken on
light from distant galaxies, there has been an increase
in the
of light .
This is called the
. This evidence leads us to
believe that the universe is
.
Astronomers now believe the universe had a clear beginning,
called 'the Big Bang'.
At the beginning, the universe was in a very
state,
and then, over time, expanded to the huge size we see today.
