Why do trees have rings inside?
Show answer & explanation
Answer: Growth varies by season
Growth varies by season ✓ — Correct! Trees grow faster in spring/summer (light ring) and slower in fall (dark ring). Each pair is one year. Ring width shows growing conditions—thick rings mean good years. Scientists use rings to study climate history going back thousands of years!
Rings transport water — Wrong. Water flows through the outer rings, but rings form from seasonal growth differences, not water transport.
Trees mark their age — Wrong. Rings don't intentionally mark age—they're a byproduct of seasonal growth variation.
Go deeper: Dendrochronology
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