| A | B |
|---|
| The sun's energy come from... | nuclear fusion |
| link different parts of sunspot regions | prominences |
| three layers of the sun | photosphere,chromospherecorona |
| charged particles from the corona | solar wind |
| explosions of gas on the sun | solar flares |
| small and have rocky surfaces | inner planets |
| rotates backward from most planets | Venus |
| is red and has ice | Mars |
| Earth at the center of solar system | geocentric |
| This planet would float in water | Saturn |
| distance light travels in a year | light year |
| keep the planets in orbit | gravity and inertia |
| area of sun that produces solar wind | corona |
| small solid outer planet | Pluto |
| located between mars and jupiter | asteroid belt |
| when a meteor hits the earth | meteorite |
| planets similar in size and density | Venus and Earth |
| Earth is unique because it has this | oceans |
| made of chunks of rock and ice | Saturn's rings |
| rotates on its side | Uranus |
