2. By: Zack LeBoeuf & Jasmine LeBean

3. History of the Screw The screw was invented in the first century in Greece. The inventor is unknown.

4. Screw The screw is a circular inclined plane with a wedge. Screws are self locking They are used in different products such as a bolt, a swivel stool, a jar lid, and a light bulb.

5. Uses There are two uses of screws, convert a force that goes around into one that goes up and down. For example, a cider press.

6. Uses Continued Screws can thread things so that two things are locked together and can’t fall apart. The most common use of screws today.

7. Comprehension Questions 1. What other simple machines are screws like? 2. What are the most common use of screws today? 3. Where were screws invented? 4. Give one example of the screw?

8. Answers 1. Inclined Plane 2. Threading things together 3. Ancient Greece 4. Bolt, jar lid, light bulb, and swivel stool.

9. THE END