| A | B |
| marsupial | animal that carries its young in a body pouch |
| tectonic plate | huge piece of the Earth's crust |
| geyser | hot spring that shoots scalding water into the air |
| fiord | narrow inlet |
| high island | island formed by volcanoes |
| low island | island that is a reef or an atoll |
| atoll | ring shaped coral island surrounding a lagoon |
| coral | rocklike material made up of skeltons of tiny sea creatures |
| penal colony | place settled by prisoners |
| station | extremely large ranch |
| Melanesia | means black islands |
| Micronesia | means small islands |
| Polynesia | means many islands |