Across
- 1. An object in orbit around a larger one eg the moon or space probe.
- 4. The luminous surface of the sun and stars. The Sun`s photosphere is 500km thick.(London to Scottish border).
- 8. 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.
- 9. Small body of icy and rocky materials found and formed in the Oort cloud and Kupier belt and some enter the solar system.
- 10. a smaller planet compared to Earth composed of rocky material.
- 12. Giants planet larger than Earth composed of mainly hydrogen and helium. Also called Giant planets.
Down
- 2. 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.
- 3. backward (clockwise ) movement of planets orbiting the sun eg Venus and Uranus( which is also tipped on its side.)
- 5. Large rocky or gaseous body in orbit around the sun.
- 6. 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.
- 7. Sun and all bodies that orbit around it (planets and their satellites, comets and asteroids)
- 11. forward (anticlockwise) movement of planets orbiting the sun. (all except Venus and Uranus.