Did you know that you use lasers each time you listen to a CD or watch a DVD? Lasers are very useful devices. They help doctors treat patients and help scientists search for life on Mars!
Write an expository essay about a way of using lasers. First, you will need to research what lasers are and how they are used. Here are some questions to guide your research:
How do lasers work?
In what ways do people use lasers?
Why are lasers useful?
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 lasers at the library. When you are ready, follow Steps 3 and 4 to write your report.
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 learn how to move from one Web page to another.
