Across
- 5. A measure of how much light is reflected by a planet.
- 6. A packet of light - often treated as a particle.
- 8. _____ Unit: Represents the distance between the earth and the sun.
- 11. A planet orbiting a star outside our solar system.
- 12. The locations on earth where light energy is less concentrated.
- 13. Electromagnetic ________: The technical term for “light”
- 16. A cellular organelle that specializes in absorbing light energy.
- 19. _____ Giants: a planet made of mostly hydrogen and helium.
- 20. _____ Giants: a planet made of frozen substances.
- 22. The explosion that happens at the end of a massive star’s life.
- 23. ______ Nebula: a cloud of gas made of mostly hydrogen.
- 24. ______ state: When an electron absorbs energy and moves to a higher orbital.
- 27. ____ ____ (Two words: 5, 4): The distance light travels in one year.
- 30. A period of rapid growth of the universe - doubling in size and starting to cool.
- 31. ______ Nebula: a cloud of gas that is blown off at the end of an average star’s life.
- 32. The ____ ____ (Two words: 3, 4): A large amount of energy in a small amount of space begins to expand.
Down
- 1. Cosmic _____ Background: A “map” of the early universe, showing regions of hot and cooler spots. The cooler spots are where stars would eventually be born.
- 2. ______ gasses: Traps infrared radiation that is released from absorbed light energy on the planet.
- 3. Red ______: As an average star runs out of fuel, it will greatly expand.
- 4. A measure of the amount of light reaching a surface.
- 7. A space with a missing electron - moves similar to an electron, but in the opposite direction.
- 9. Red ______: As a massive star runs out of fuel, it will greatly expand.
- 10. Nuclear _______: The process of combining atoms together
- 14. White ______: The remaining core of an average star at the end of its life.
- 15. _____ Electrons: Electrons removed from their atoms.
- 17. _____ Planets: a planet made of solid rock and metal.
- 18. Each packet of light contains a set amount of energy, which corresponds to this.
- 21. Solar _____: Two layers of material with a difference in charge used to collect light energy.
- 25. _____ Method: Uses small changes in light received from stars to identify planets.
- 26. _____ Hole: An object with such high-density, it traps light in its gravitational field. The largest massive stars will eventually become these.
- 28. The location on earth where light energy is more concentrated.
- 29. _____ Star: Electrons combine with protons in this remaining high-density body at the end of a massive star’s life-cycle.
- 31. A state of matter found in the early universe and inside stars - electrons and nuclei are completely separate.