We eat different parts of different plants. The Magic School Bus at the Waterworks by Joanna Cole has some really good information for you. People have been working to save Planet Earth for many years. John Muir is famous for his fight to save the beauty of America. Draw a map of the state where John Muir was successful.
Light energy can absorb color.
Cut a piece of colored construction paper in half. Place one half in a bright sunny spot. Put the other half inside a book where no light reaches it. After a week or so, compare papers. Explain what happened.