If you have really never seen a tree on a windless day, you need to go outside and sit under a tree for a few hours so you know what trees are like! You describe the leaves the same way you describe everything else you experience: use your senses. Tell what they look like and sound like and smell like and feel like. This is going to be different with every tree, so it's not going to be any good me describing a type of tree that doesn't live near you. On a windless day, you know that the leaves are also not going to be flapping around in the wind!
On a windless day, tree leaves would likely appear still and motionless, hanging down or spreading outwards depending on the type of tree. The leaves may seem heavy or sagging without any movement or rustling sound typically associated with a breeze.
Evergreen trees do not shed their leaves in the Autumn.
The difference between deciduous trees and fir trees is that deciduous trees lose their leaves while fir trees do not. Deciduous trees usually lose their leaves during winter, but some in the tropics lose their leaves during the dry season.
Deciduous trees.
Yes, the phrase "leaves are jumping off trees" could be considered a metaphor if used to describe leaves falling from trees in a way that personifies the leaves as actively leaping or jumping. Metaphors use one object or idea to represent another, in this case, using the image of jumping leaves symbolically to describe their movement.
A syllogism
Pine trees leaves do not change colour during autumn, as they are evergreen trees.
I presume you mean leaves. All deciduous trees lose their leaves in winter.
Deciduous.
trees make food during the summer from the sunlight they trap through the leaves and turn it into food, this is called photosynthesis but due to lack of sunlight during the winter, the trees store just the right amount of food to maintain the branches and the trunk but not the leaves so to save on food supply, the trees loose their leaves
The taiga, or boreal forest, is given to high seasonality with a long season during which temperatures are below the freezing point of water. As such, trees must be conifers, with very limited leaves (needles) adapted to the cold, or be deciduous trees that are well adapted to the stress involved in losing its leaves every year. For instance, I live in the central region of Alaska. We have deciduous trees and conifers. The farther north you go though, the fewer deciduous trees there are.
These are called deciduous trees. Trees that keep their leaves in winter are called coniferous. Most coniferous trees have needle leaves and cones. Deciduous leaves vary in shape and size but most trees that don't have a needle shaped leaf are deciduous trees.
Deciduous trees are trees that shed their leaves seasonally. During a certain part of the year every year. They loose all of their leaves during the cold or dry season and, depending on the climate, remain bare till spring time.