| A | B |
|---|
| Antarctic Treaty | an agreement that allows people to use Antarctica for peaceful things only |
| circumnavigate | to go all the way around |
| expedition | a long journey with a special purpose |
| frostbite | when parts of the body freeze |
| glacier | a huge slab of slow-moving ice |
| migrate | to move from one place to another |
| pack ice | huge chunks of sea ice that been crushed together |
| polar desert | an area of dry, frozen land where hardly any snow falls |
| tundra | flat, treeless land where the ground is frozen |
