Lesson 15-16

2. to follow the track of
4. to throw forward; to extend
7. partly digested food returned from the stomach to the mouth for further chewing
8. frame of mind influenced by emotions
13. a match as in ability, size, etc.; the same
14. the body of a dead animal
15. to learn by means of experiment; to find out
16. a particular point or detail
18. skill in planning or making; inventiveness
19. seeking to learn; asking a question of; curious
20. to break suddenly into pieces

1. to figure or compute; to determine by mathematical methods
3. the practice of using natural science, mathematics, and the engineering design process to solve problems and design, build, and maintain structures, machines, systems, and processes
5. a plan; a complex system
6. to find; to search for
9. to trace the outline of
10. a part into which something is naturally divided
11. to roll around in
12. suspend or arrange something with a strap so that it hangs loosely
17. to transport; to carry from one place to another