Across
- 3. The coldest surface temperature of a star is this colour.
- 5. A resultant force causes...
- 6. Unit of Force
- 10. A dead core of a relatively light star, like our Sun. There is no more fusion occurring.
- 11. Nuclear _______ is the process of joining up small atomic nuclei to form larger ones. This releases the energy that powers stars.
- 12. Stage of a star after a lighter star, similar to our Sun, runs out of hydrogen and begins fusing helium and other heavier elements together.
- 17. When the resultant force = 0N, we say forces are...
- 19. The gravitational field strength of an object depends on its...
- 20. A collection of billions of stars.
- 23. Planets' and Moons' orbits are this shape.
- 26. The amount of matter contained within an object
- 27. Stage of a star when it is fusing hydrogen into helium. Longest stage of its life.
- 30. The force due to gravity
- 32. Your weight _________ when standing on Jupiter, rather than Earth.
- 33. Unit of mass
- 34. Very Heavy stars can end up as this extremely small and extremely dense stage at the end of its life. It is still visible.
- 35. Heavier stars will continue fusing elements up to Iron. The core then collapses under its own gravity and violently explodes as a __________.
- 36. The _______ magnitude is a measure of how bright an object appears to our eyes as we see them.
Down
- 1. A Red ________ is the stage after stars much heavier than our Sun run out of Hydrogen to fuse.
- 2. A quantity with both magnitude and direction
- 4. The gravitational field strength of Earth is roughly _____ N/kg (In words).
- 5. Force that increases the faster you are moving
- 7. Unit of Weight
- 8. Speed in a given direction
- 9. The ______ of the star is where nuclear fusion takes place.
- 13. Gravitational field strength _________ as you get further from the surface of a planet/star/moon.
- 14. This property of a star determines which type of life it will follow after its Main Sequence stage.
- 15. The _______ magnitude is a measure of how bright a star, or something else, is from a fixed distance away.
- 16. Unit of speed or velocity
- 18. The nucleus of this element's atom is used as fuel in Main Sequence stars.
- 21. The heaviest stars keep collapsing under gravity until their gravitational field is so strong that not even light can escape.
- 22. The sum of all forces. Needs to not be 0N to cause an object to accelerate.
- 24. A Comet's orbit is this shape.
- 25. The hottest surface temperature of a star is this colour.
- 28. In this stage in a young star's life, the dust and gas is now dense enough to get hot and glow, but not cause any fusion yet.
- 29. A cloud of dust and gas that is pulled together by gravity.
- 31. The mass of an object is c_______ no matter where it is in the universe.