Fluctuating temperatures from -420 to 80 degrees Celsius
0K (Absolute Zero)
7. What is a centripetal force?
A contact force of electromagnetism
A resultant force which pulls objects toward the centre of the circle, continually changing the direction that an object is travelling in to keep it in circular motion
The force of gravity providing a continual change in direction
Pressure created by the immense heat from nuclear fusion, creating equilibrium in any satellite - natural and man-made.
8. A Red Giant or Red Super-Giant does what?
Expansion and Nuclear Fusion of Helium
Turns red
Not Nuclear fusion
Expansion
9. CMBR ( Cosmic Microwave Background Radiation) comes from every direction in space. Where is it from?
Radiation created at the beginning of the universe
Every star in space emitting radiation
Black Holes leaking radiation from another dimension
Supernovas - constantly happening in every direction in space
10. Big Bang theory is the only theory that can explain what?
The meaning of life
Presence of CMBR
Universal entropy
Creation of the universe
11. The main sequence of a star ends when?
There is insufficient heat for fusion
The hydrogen for nuclear fusion runs out
The elements for nuclear fission run out
The star dimmens
12. Red-shift involves what?
Inflation
The Doppler Effect
Autokinetic effect
Scott's Butterfly effect
13. The fact that the further away a galaxy is, the more its light is red-shifted supports what idea?
The universe is infinite
The idea that the start of the universe could have been from a single explosion
The universe is expanding
Red-shift concept
14. What colour stars would burn hottest?
Yellow
White
Blue
Red
15. What is Baryonic matter?
Atoms, Photons & Neutrinos
Atoms, Photons, Neutrinos & Dark matter
Atoms
Atoms & Photons
16. The Big Bang produced what?
Elements heavier than iron
Hydrogen and Helium
Supernovae
The reversal of a black hole
17. What is "equilibrium" for a star?
Force of pressure from immense heat from fusion is in balance with the force of gravitational attraction
The forwards reaction of nuclear fusion of hydrogen is happening in the same amount as the backwards reaction
the star is white - a combination of all colours instead of just one colour
18. What is a nebula?
Clouds of gas and dust
An accumulated formation of liquids floating in space, which may facilitate life
A collision of stars
An asteroid belt
19. Why are geostationary orbits useful?
It's close orbit means there is a better view of the Earth below
It means the satellite is constantly over the same spot on earth
It means that temperatures across one orbit (e.g over the equator) can be monitored by one satellite orbita
It means that its high speeds (since it's close to Earth) can be used to generate electricity
