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30-3
Antarctica
| Term | Definition |
|---|---|
| extinction | complete disappearance from the Earth of a particular kind of plant or animal |
| krill | tiny shrimp like sea creatures that provide food to whales and many other sea animals |
| ozone | gas that forms a layer around the Earth in the atmosphere; it blocks out many of the most harmful rays from the sun |
| research | work done by scientists or scholars |
| specify | make clear |