ONE WORD SUBS

2. – A person who believes people act only out of selfish motives.
7. – Capable of being decomposed by bacteria or other living organisms.
8. – A fictitious name used by an author.
9. – A person who introduces new methods, ideas, or products.
11. – The science that deals with the movement and pressure of fluids.
12. – A person who is skilled in foreign languages.
13. – The process of destroying or tearing down a structure.
14. – The gradual destruction or removal of something by natural forces (like wind or water).
15. – The practice of securing information by converting it into code.
19. – The science or art of making maps.

1. – The branch of physics that deals with heat, energy, and their transformations.
3. – The arrangement of events in the order of their occurrence.
4. – Capable of achieving maximum productivity with minimum wasted effort or expense.
5. – A person who tends to be hopeful and confident about the future.
6. – A state of balance.
8. – The main character or leading figure in a story or project.
10. – An instrument that measures the distance traveled by a vehicle.
16. – An original model used to test a concept or process.
17. – A person inclined to question or doubt accepted opinions.
18. – A person or behavior that is impossible to change or correct.