Across
- 2. an example of a terrestrial planet in our solar system
- 6. an example of a gas giant in our solar system
- 7. large planet mostly composed of helium and/or hydrogen
- 8. a planet the same size as Earth or smaller, mostly made of rock and metal
- 9. a gas which makes up a large part of both gas giants and neptunian planets
Down
- 1. a planet with mainly hydrogen and helium outer atmospheres and rocky cores
- 3. a planet which orbits a star outside the solar system
- 4. the gases surrounding a planet
- 5. an example of a neptunian planet in our solar system