Many everyday machines contain gears that transfer energy from one part of the machine to another. Gears are wheels with teeth on their outer edges. The teeth are designed to mesh together. The turning of one gear transfers energy to a second gear, causing it to turn as well.
Write an explanatory essay about an everyday gadget or device containing gears. To write your essay, you will need to research gears in machines. Here are some questions to guide your research:
What are gears?
How do gears make work easier?
What are some everyday devices that contain gears, and how do the devices work?
Are you ready? Begin by visiting the Web sites in Step 2. Look for answers to the questions above, and write down what you learn in the note-taking boxes.
With teacher supervision, you may use search engines to research other Web sites. You also can research gears at the library. When you are ready, follow Steps 3 and 4 to write your explanatory essay.
Step 2. Research
Research answers to the questions you were asked in Step 1. Visit these Web sites. Take notes about them on this page, too!
Toolbox Tip: Click here to find out how to surf the Web safely.
