Lesson 10③

1. black powder that is produced when something burns
2. a plant that is used to produce grain for making flour
6. a large amount of something all in a group
9. an area around the River and the Euphrates in Iraq
10. the long tube in you body that carries food away from your stomach
11. a very small piece of something
12. a member of group of people that lives by hunting and looking for plats that can be eaten
13. a farm animal with horns that has long hair under its chin

1. a level that measure how good something is or how well someone does something
3. a change from one state or form to another
4. primitive people have a simple way of life, without modern machines
5. a society that is well organized and developed
7. an official group of people who are important in art, science, or literature
8. to use energy, products etc
11. to show something is definitely true
12. a plant used to improve the taste of food or to make medicine