Click here to read "The First Earth Day". Then answer the following questions:
1. Whose idea was earth day?
2. What is the purpose of Earth Day?
3. When was the first Earth Day celebrated in the United States?
4. When did the United Nations make Earth Day an international event?
5. What happened as a result of the first Earth Day?
In 2010, President Obama proposed a challenge for Earth Day. Watch the video above. Tell something you think you can do to help make our Earth a cleaner place.
After you answer, click here to take the Earth Day Quiz .