| A | B |
|---|
| nebular theory | states that the solar system formed from a rotating cloud of dust |
| solar nebula | large thin cloud of dust expelled from other starss that formed our solar system |
| protoplanetary disk | disk shaped cloud of dust looking like an egg formed from nebular |
| planetesimals | rocks, dust and gases that collided and combined to form planets |
| accretion | process of adding mass to a planet through colliding and combining matter |
| core | where nuclear fusion (hydrogen nuclei colliding) in the sun causes energy |
| radiation zone | area outside the core with highly compressed gases which produce light |
| suns inner and outer forces | temperature density and pressure are balanced and stable |
| convection zone | outer layer of the sun usung convection to send light outward towards space |
| photosphere | the sun's surface |
| chromosphere | middle layer of sun's ATMOSPHERE producing reddish light |
| Corona | surface of the sun seen during an eclipse |
| sunspots | small dark-looking regions on the sun's surface- give off magnetic fields |
| prominences | huge loops of gas erupting from sunspots |
| solar flares | dramatic eruption of sun's surface causing earth power signals to fail |
