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You can count a tree's age by the rings inside its trunk.

You can count a tree's age by the rings inside its trunk.

Each year a tree grows one new ring under its bark. If you count the rings, you can tell how old the tree is.

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Trees make their own food from sunlight, air, and water. Trees make their own food from sunlight, air, and water. Trees give us cool shade and help clean the air. Trees give us cool shade and help clean the air. Acorns are seeds that can grow into big oak trees. Acorns are seeds that can grow into big oak trees. Many trees are cosy homes for birds, squirrels, and bugs. Many trees are cosy homes for birds, squirrels, and bugs. Some trees can live for thousands of years. Some trees can live for thousands of years.