Edexcel P1 - Topic 1

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Across
  1. 2. In a reflecting telescope there is one lens and two _________.
  2. 5. This lens in a refractive telescope, converges the waves to form an image.
  3. 9. This is when waves bounce off of a surface.
  4. 11. Planets in our Solar System actually orbit the Sun. This is known as a _____________ model.
  5. 12. Complete this equation: Wave Speed = __________ x wavelength.
  6. 14. The _________ length of a lens is the distance between the lens and where the image is focused.
  7. 15. Complete this equation: Wave Speed = __________/ Times.
Down
  1. 1. This lens in a telescope magnifies the image.
  2. 3. These waves move at right angles to the direction of the wave. An example is light waves.
  3. 4. These waves move parallel with the direction of the wave. An example of these is sound waves.
  4. 6. Most of our information about our Solar System, the Milky Way and the Universe comes in the form of _______.
  5. 7. Astronomers can use this to compare and monitor how planets and stars move over long periods of time.
  6. 8. The early astronomers thought that the Sun, Moon and planets moved in orbits around the Earth.__________ Model.
  7. 9. When a wave crosses the interface (boundary) between two different materials its speed changes. This is called _________.
  8. 10. Galileo observed the moons of this planet and it supported the new model of the solar system.
  9. 13. This is the type of lens that is wider in the middle than at the edges.
  10. 16. Waves transfer information and _________ without transferring matter.