2.  A tool is an instrument or utensil that is used for manual operation.

3.  A machine is an operating system, usually automatic. Antique copy machine Espresso machine

4.  An Invention is a new and useful machine or tool. Sewing machine Printing press

5. Phonograph (1877) by Thomas Edison Kodak Camera (1888) by George Eastman Television (1924) By Vladimir Zworykin

6. Sewing Machine (1851) By Issac Singer Traffic Light (1916) By Garret A. Morgan Dishwasher By Josephine Cochrane

7. Gasoline Automobile (1892) By Charles Duryea and J. Frank Duryea Motor Airplane (1903) By Orville and Wilbur Wright Helicopter (1939) By Igor Sikorsky

8. Bifocal Lenses for Eyeglasses (1780) By Benjamin Franklin Polio Vaccine (1955) By Jonas Salk Artificial Heart (1982) By Robert Jarvik

9. Telegraph (1837) By Samuel Morse Telephone (1876) By Alexander Graham Bell Xerox Copies (1938) By Chester Carlson

10.  To make a cup of tea?  To change a flat tire?  To travel to Antarctica?  To cross the Sahara?  To lift a heavy object?  To build a house?

11.  Screwdriver  Ball of twine  Chewing gum  Rock  Piece of paper  Coat hanger  Hammer

12.  Use a screwdriver to pry open a glass bottle  Use a coat hanger to lift a ring from boiling water  Use a rock to keep the door closed  Use chewing gum to stop the pipe from leaking

13.  Use a hammer to pry the nail from the wall  Use a screwdriver to open a jar  Use chewing gum and a ball of twine to lift the coin out of the sewage gate

15. A Cooking Machine I would like to invent a machine that did all my cooking for me. There would be a big funnel on the top. I put all the meat and vegetables and salt and spices into the funnel. It goes into a big box that has knives in it to chop up everything. Then a heater automatically cooks everything, and a thermometer monitors the cooking process. Finally levers with scales measure everything and drop it onto the plate, meat on one side, veggies on the other. A computer input would let me enter recipes to make special foods.