GEOLOGY

Detailed explanation-1: -Narrower rings represent worse growing conditions, ie cooler and drier. Hence, it provides a broad record of climatic conditions between 2002 and 1961.

Detailed explanation-2: -Because trees are sensitive to local climate conditions, such as rain and temperature, they give scientists some information about that area’s local climate in the past. For example, tree rings usually grow wider in warm, wet years and they are thinner in years when it is cold and dry.

Detailed explanation-3: -Each year, the tree forms new cells, arranged in concentric circles called annual rings or annual growth rings. These annual rings show the amount of wood produced during one growing season.

Detailed explanation-4: -One light ring and one dark ring represent one year of the tree’s life. Additionally, a young seedling will grow faster than a mature tree. So, growth rings may become progressively smaller as the tree ages.

Detailed explanation-5: -A tree ring, representing one year, consists of two layers: A light colored layer which forms in the spring and early summer, which is typically thicker because the tree is growing. A dark colored layer which forms in late summer and fall, which is typically thinner because the trees growth slows.