How old is the tree?

Students count rings on wood slices and calculate the age of trees in the park.

Steps

1. We count rings on wood slices and talk about what they say about dry and wet years.
2. In the park, students measure the trunk circumference at a height of 1.3 m.
3. They calculate the approximate age of the tree (circumference in cm divided by 2.5).
4. They mark results on a local map.

Tip: You can buy wood slices at a craft store.

Materials needed

• Wood slices (1 pack)
• Measuring tape (1 per group)