Across
- 2. chemical element with the symbol H
- 5. the outermost part of the Sun's atmosphere
- 8. relating to the nucleus of an atom
- 10. the chemical element of atomic number 2
- 11. a celestial body moving in an elliptical orbit around a star
- 13. light from the sun
- 15. dark areas that become apparent at the Sun's photosphere
- 16. a natural electrical phenomenon
- 18. a state of matter that has no fixed shape and no fixed volume
- 20. a sudden brief burst of bright flame or light
Down
- 1. between the star's photosphere and its corona
- 3. a branch of physics involving the study of the electromagnetic force
- 4. the force exerted by magnets when they attract or repel each other
- 6. movement in a gas or liquid in which the warmer parts move up and the cooler parts move down
- 7. energy that comes from a source and travels through space at the speed of light
- 9. a particle that has energy and movement; but, it does not have mass or electrical charge
- 12. the whole mass of air that surrounds the Earth
- 14. an ionized gas consisting of positive ions and free electrons in proportions resulting in more or less no overall electric charge
- 17. any massive self-luminous celestial body of gas that shines
- 19. relating to or determined by the sun