Across
- 3. made an invention that could reap wheat
- 5. a test to see if something works
- 6. an office machine that prints numbers and letters
- 11. invented the lightbulb
- 12. something that solves a problem and makes things better
- 14. to seal two pieces of cloth together
- 15. an invention that replaced candles
- 17. when someone exchanges money for something that you have
- 18. an agreement that protects the rights of the inventor
Down
- 1. an inventor that made the cotton gin
- 2. an inventor that found more than 325 useful things for the peanut
- 4. inventor of the lasting machine
- 7. an invention that plays back a recorded voice
- 8. A buying and selling game
- 9. something you can exchange for something else
- 10. inventor of the cotton gin
- 13. how much something costs
- 16. when you exchange money for something