EVERYDAY SCIENCE

SCIENCE

BOTANY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If you are examining a tree cross section and you notice a light ring is wider than all the others, what does that mean?
A
It was the best summer growth year
B
It was the best winter growth year
C
It was the worst summer growth year
D
It was the worst winter growth year
Explanation: 

Detailed explanation-1: -For example, tree rings usually grow wider in warm, wet years and they are thinner in years when it is cold and dry. If the tree has experienced stressful conditions, such as a drought, the tree might hardly grow at all in those years.

Detailed explanation-2: -A wide ring indicates faster tree growth, enabled by good growing conditions, while a narrower ring indicates slower tree growth caused by poorer growing conditions.

Detailed explanation-3: -The light-colored rings are the wood that grew in spring and early summer, while the dark rings indicate growth in late summer and fall. So, a light ring and dark ring together represent one year of growth. A sapling (young tree) grows much faster than an adult tree.

Detailed explanation-4: -The light ring is the result of rapid sugar-fuelled growth, which occurs in the warmer months. Towards the end of the growing season, in late summer, the cells are much smaller and form the darker part of the ring.

Detailed explanation-5: -Since most trees grow more during wet, cool years than during hot, dry years, tree rings are usually wider during wet years. Drought or a severe winter can cause narrower growth rings. When rings are consistently of the same size, it suggests that the climate is consistent from year to year.

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