Chapter 1 Part 1

1234567891011121314151617181920
Across
  1. 3. A body of rocky materials orbiting around the sun. Smaller than a planet. Are often found and formed in the asteroid belt between Mars and Jupiter. Largest known asteroid (called Ceres) is classified as a dwarf planet.
  2. 5. A localised volume of the Sun`s outer layers in w2hich enhanced magnetic fields give rise to transient phenomena in the sun spots and prominences. Such regions are associated with Flares.
  3. 7. backward (clockwise ) movement of planets orbiting the sun eg Venus and Uranus( which is also tipped on its side.)
  4. 8. any equation in which size of one quantity is inversely proportional to the square of another quantity. Newtons Law of Gravity is an example of Inverse square Law as is the relationship between brightness and distance eg., a 100w light bulb seen at a distance of 300m is 9x less bright than at a 100m. In other words the further the distance the broarder the light beam but less powerful.
  5. 9. A large rocky or icy body in orbit around the sun that does not fill the criteria of being classed as a planet because it has not swept out a clear path on it`s orbit.
  6. 10. forward (anticlockwise) movement of planets orbiting the sun. (all except Venus and Uranus.
  7. 12. solar system bodies that have average distances from the Sun further than Neptune eg, the Kuiper Belt where the comet Pluto is found (billions of km away from the sun whereas the Earth is 150 million) and the Oort cloud (13.9 trillion km away from the sun) Where Halley`s comet is found.
  8. 16. A spurt of hot solar material extending outwards from the edge of the Sun.
  9. 18. A relatively cool region of the Sun`s photosphere that appears as a dark spot on images of the sun.
  10. 20. An object in orbit around a larger one eg the moon or space probe.
Down
  1. 1. Large rocky or gaseous body in orbit around the sun.
  2. 2. small hot star left behind when a red giant throws off it`s outer layers as a planetary nebula. A white dwarf has a mass similar to that of the sun but a radius similar to Earth. A white dwarf is supported against gravity by an effect of Quantum physics known as electron degeneracy pressures (quantum physics-Study of behaviour of matter and energy at the molecular/atomic/ nuclear/small microscopic levels.
  3. 4. a smaller planet compared to Earth composed of rocky material.
  4. 6. Small body of icy and rocky materials found and formed in the Oort cloud and Kupier belt and some enter the solar system.
  5. 11. A large, cool start that is going through subsidiary (less imp) stages of nuclear reactions, having exhausted it`s hydrogen fluid supply.
  6. 13. Sun and all bodies that orbit around it (planets and their satellites, comets and asteroids)
  7. 14. The luminous surface of the sun and stars. The Sun`s photosphere is 500km thick.(London to Scottish border).
  8. 15. Lower part of the Sun`s atmosphere situated immediately above the photosphere.
  9. 17. Giants planet larger than Earth composed of mainly hydrogen and helium. Also called Giant planets.
  10. 19. A highly energetic form of solar activity, lasting a few hrs, caused by a sudden release of magnetic energy in the corona(upper part of the Sun`s atmosphere-very hot)