Give scientific term for determination of the age of a tree by counting the number of annual rings.

Explanation

**Step-by-Step Solution:**

1. **Understanding Annual Rings**: Annual rings are layers of growth that form in the stems of trees, particularly in dicotyledonous trees. Each year, a tree adds a new layer of wood, which can be observed as rings in a cross-section of the trunk.

2. **Formation of Annual Rings**: In temperate regions, trees experience seasonal changes that affect their growth. The vascular cambium, a layer of tissue in the tree, produces two types of secondary xylem each year:
- **Spring Wood (Early Wood)**: This is formed during the spring when conditions are favorable for growth.
- **Autumn Wood (Late Wood)**: This is formed in the autumn when growth slows down.

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