Lichen: Life on the Rocks
Step 1. Questions
You have read an article about lichens and the way they can grow on rocks. A lichen is two things that work together!
Write a summary of information about lichens. Use the article on pages 198–199 of your textbook. You can research lichens on the Internet to learn more. Here are some questions to guide your research:
What are the two parts of lichens?
Where do lichens grow?
What can lichens tell us about pollution?
How can lichens change a rock?
Are you ready? Begin by visiting the Web sites listed in Step 2. Look for answers to the questions above. 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 lichens at the library. When you are ready, follow Steps 3 and 4 to write your summary.
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!
to learn what to do if you receive an error message when visiting a Web page.
Oregon State University put together this Web site to help you understand lichens. Read the page to learn facts about lichens.
Lichens and Ecosystems
This site has several photographs of lichens. Click the pictures to make them larger. Learn how lichens can help you tell whether the air is clean or dirty by reading the text under "Environmental Studies using Lichens."
Read about lichens at the British Natural History Museum's Web site. First, read the introduction to lichens. When you have finished reading, click THE LICHEN GUIDE and then A GUIDE TO LICHENS ON TWIGS to learn about identifying different kinds of lichens.