Multiple choice general knowledge science & technology How is the age of a tree determined? By measuring its girth By counting the annual rings in a cut trunk By counting the number of its branches By measuring its height Reveal answer Fill a bubble to check yourself B Correct answer Explanation Tree age is most accurately determined through dendrochronology - counting the annual growth rings visible in a cross-section of the trunk. Each ring represents one year of growth, with light and dark bands showing seasonal variations.