2. Domesticate
Domesticate – To tame animals to make them useful to people.

4. Migrate
Migrate – To go from one place, country, region or place to another. Example – some birds migrate to a warmer climate in the winter.

6. Flaking
Flaking – a usually broad, often irregular piece of stone struck from a larger core and sometimes retouched to from a flaking tool.

8. Surplus
Surplus - an amount or quantity greater than needed.

10. Glacier
Glacier – A great sheet of slowly moving ice.

12. Nomad
Nomad – A person without a permanent home that travels from place to place in search of food.

14. Prehistory
Prehistory – The period of time before events were recorded in writing.

16. Ice Age
Ice Age – A long period in the past that lasted for millions of years. Glaciers covered much of the Earth.

18. Cultivate
Cultivate – Prepare and use land to raise crops; farming.

20. A.D.
A.D. – Stands for Anno Domini; all years after year 0 to the present.

22. B.C.
B.C. – Stands for Before Christ; all years prior to the year 0.

24. Specialize
Specialize - To train to do a particular kind of work (artist, blacksmith, carpenter, etc.).

26. Paleolithic Era
Paleolithic Era – Earliest period of human culture, beginning 2 million years ago and lasting until 8,000 B.C. Also known as the (Old Stone Age).

28. Neolithic Era
Neolithic Era – A period in history that began in 8,000 B.C. in which people first lived and farmed in communities. Also known as the (New Stone Age).