This can be given to students to work on independently in a reading center or done as a whole-class activity. Students read the passage about "tree cookies" (slices cut from a tree's trunk) and how we can find clues about a tree's life by looking at them. After reading, students look at the picture of a tree cookie and practice labeling the parts, figuring out how old the tree was, what years the tree had lots of water, and what might have caused the scar. All necessary information to complete the activity is in the reading passage.
This activity is also a great precursor to having a science/writing center where students can look at a real "tree cookie" and write about what they see.