A. Mercury is closest to the Sun and gravity makes it orbit at a faster speed than Venus
B. Mercury is closest to the Sun and gravity makes it orbit at a slower speed than Venus
C. Venus is closest to the Sun and gravity makes it orbit at a faster speed than Mercury
D. Venus is closest to the Sun and gravity makes it orbit at a slower speed than Mercury
3. Which row in this table best describes the orbits of moons and dwarf planets in our solar system?
Moons..
Dwarf planets...
A)
orbit the Sun
orbit the Sun
B)
orbit major planets
orbit the Sun
C)
orbit the Sun
orbit major planets
D)
orbit major planets
orbit major planets
4. What elements are the most common in stars like the Sun?
A. hydrogen and oxygen
B. oxygen and carbon
C. hydrogen and helium
D. carbon and helium
5. The Sun produces energy through....
A. chemical reactions
B. nuclear fission reactions
C. nuclear fusion reactions
D. gravitational collapse producing heat
6. 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
7. 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.
8. 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.
9. 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.
10. 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.
