1. Agriculture: Farming.

2. Domestication: The process of changing (or to
tame) plants and animals to make them more
useful to humans.

3. Neolithic Era: The New Stone Age; when people
learned to farm and make more complex tools (such
as saws and drills).

4. Specialization: The development of different
kinds of jobs.

5. Irrigation: A way of bringing water
to a field from another place to
water crops.

6. Surplus: More of something than is needed.

7. Barter: To exchange goods without using money.