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words and definitions
| Term | Definition |
|---|---|
| alien | Something that's ____ is different or foreign. In science fiction, a space ____ comes from other planets. In reality, an illegal ____ comes from other countries. |
| frontier | A ____ represents unknown territory. It could be a remote piece of land or a new field of study, but if someone calls it "the ____," you are challenged to explore it. |
| primitive | When we talk about "____ man", we're usually talking about cavemen and other people who existed before modern society, but if your uncle speaks grunts and chews with his mouth open, you could describe him as ____ too. |
| proof | ____ is the evidence that shows something is true or valid. |
| civilization | ____ is an advanced stage of human society, where people live with a reasonable level of organization and comfort and can think about things like art and education. |
| creature | A ____ is a living thing: there are flying ___s, sea ___s, and even imaginary ___s, like unicorns. |
| indigenous | We use ____ to describe a plant, animal or person that is native or original to an area. Although Switzerland is known for its chocolates, the cocoa plant is ____ to South America. |