what makes the leaves of the trees falls at autmen?

Question

is its the change of weather heat??

Answer 1

The change in temperature affects the amount of light the leaves of a plant can absorb and use for photosynthesis. When the colours of the leaves change to red/yellow/brown, the pigements in the leaves are changing. Green pigment is better at absorbing light but as there becomes less and less light, the plant is forced to switch to red/yellow/brown/orange pigments so that it can better absorb the little amount of light there is. As the temperature falls less and less sugar is produced through photosynthesis to keep the leaves alive. Eventually there isn't enough sugar to keep the leaves alive and they fall off. More sap is produced in the winter from sugar stores to insulate the tree and keep it alive during the winter. Hope that helps!

Answer 2

The tree begins to feel the cold season coming on and draws the moisture out of the leaves and back into it's interior (the part that continues to grow) the leaves begin to 'turn' and eventually fall, the tree is now 'winterized'.

Answer 3

When the tree goes dormant the food for the tree [sap] goes down to the roots starving the leaves so they dry up and fall off, in the spring the SAP rises and the tree sprouts new leaves. HOPE THAT HELPS

Answer 4

Basically, the sap stops going out to the leaves as the planet turns towards it's winter revolution around the sun. The leaves die and fall off.

Answer 5

The trees die in summer, so they can't support the leaves. Winter comes along and revive the trees

Answer 6

Its the result of cool weather

Answer 7

I think the wind and the change of temperture.