Across
- 2. A giant explosion which caused the universe to expand from a single point, cooling as it does so, to form the universe today
- 4. effect The wavelength of the waves in front of the source decreases (λ – Δλ) and the frequency increases
- 7. this is how we are able to see differen colours
- 9. wavelength behind the source increases (λ + Δλ) and the frequency decreases
- 10. the further away the galaxy, the ... it is moving away from us
- 11. The ... show that light from distant galaxies is redshifted, which is evidence that the universe is expanding
Down
- 1. Forever expanding from a single point, and colls as it goes
- 3. by observing the light spectrums from ... in other galaxies there is evidence to suggest that distant galaxies are moving further apart even faster than nearby galaxies
- 5. the light moves towards the ... of the spectrum
- 6. This expansion stretches out the light waves during their journey to us, shifting them towards the ... of the spectrum
- 8. move away from each other