Science experiments for children about leaves

Observe the leaves: If you walk in the park, you will see many different leaves. Take a magnification class, collect some leaves and watch those leaves with the kids. Observation and research is fundamental scientific research, and it is never too early to cultivate children's skill. As you look at the leaves, you can ask the children questions such as: Where do you see leaves? What do you notice about the leaves? What do you notice about trees? Do all trees have the same leaves? Are there any traits that all leaves have?

You can also ask the children to draw the leaves they see. You can use them with pictures and descriptions of leaves. Leaves give us many clues when we want to identify a tree. Follow the instructions to see the leaves and try to identify the trees near you. Here are, first of all, some basic observations to learn how to identify the different parts of the leaf.

Each leaf, when spring comes, is born from a bud. The leaf blade may be formed by one or more leaflets depending on the type of leaf. The leaf may be supported by a small stem called a petiole. When there is no petiole, the leaf is considered sessile.

A network of ribs crosses the limbus and is easily visible. You will notice that very often the leaves fall in autumn; they are considered obsolete. Almost all leaf species are deciduous trees. However, some trees retain dead leaves attached to their branches during the winter season; they are said to have marshy leaves. This is often the case for oak leaves. Next winter, try to find the oak by guiding you through the dead leaves hanging from the branches.

In order to observe the leaves, it is advisable that you collect the branches. Indeed, some characteristics are affected by the arrangement of leaves on branches. To begin identification, you must first determine the leaf type you are observing. If the blade of a leaf consists of one leaf, then the leaf is simple. On the other hand, if a leaf blade consists of several leaflets supported by a petiole, the leaf is then composed. Look at the illustrations to make the difference between a single sheet and a composite sheet.

The arrangement of leaves on the branches is very important. Some tree species are characterized by this observation criterion. The leaves may be in pairs and arranged face to face at the same level on the twig. Then it is said that the leaves are opposite. This is for red maple. Try to find other species with opposite leaves.

When the leaves are on different levels around the branch, they then alternate. Look at a branch of an American elm and see if the leaves are alternating. If the leaves are also arranged around the branch, but this time at the same level, they are called curled. This arrangement of leaves resembles the shape of a star. We often find banded leaves in plants, but very rarely in trees.

The shape of the leaf, or more precisely its outline, helps us a lot to identify the tree. Be very attentive to the contours of the leaves. The description of the four types of sections will allow you to classify the leaves you will observe according to their contours.

The sheet is intact if its outline is smooth and without any particular incision. Willow leaves are a perfect example of whole leaves. Petal leaves have an outline divided by hollow. The hollow parts are called sines and share vertices called lobes. Depending on the type of trees observed, the axils and lobes may be rounded or pointed. An example of a lobed leaf is an oak leaf. If you want to see the difference between a lobed leaf with lobes and pointed axils and another with rounded lobes and axils, compare a large oak leaf with a red oak leaf.

Which of the two has sharp petals? Leaves with small sharp teeth of the same size are called serrated leaves. Look at the balsam tomal leaf, it's a serrated leaf. Sometimes there are two tooth sizes on the leaf contours. The leaf is made up of large teeth, which themselves have small pointed teeth. This sheet is called double serrated sheet. It is best observed with a magnifying glass to see the small teeth on the big teeth. Practice by looking at White list birch.

The membranous ribs are ribs that extend from the base of the limbus and are arranged like the fingers of a hand. The best example of webbed ribs is, of course, the maple leaf. Leaves with parallel ribs are covered with veins along their entire length. The ribs are located next to each other. This arrangement of veins is quite rare in trees, it is more common in plants.

There are many types of trees in our territory, all of which have special features that make them unique. We know that we will not be able to invest every kind of species, but we will do our best to make you aware or deepen your knowledge of the most common and cultivated ones. We will also look at the plants we find in many of the gardens of our homes. How many hedges and how many laurel plants we see every day, walking around the city, planting with strong fragrance leaves that bring themselves enough to taste our cuisine and cook depots, which are very beneficial for our body.

The olive tree, a symbol of peace, is increasingly found in our gardens, small plants that decorate in a simple way and communicate a kind of calm and sweetness. Magnolia found in parks. With a swollen and rounded chest rising out of a scarred landscape, the Australian baobab, also known as the "bottled tree", may seem strange or even ugly. In the dry season, it has no leaves and is more like strange creature with tentacles pointing to the sky. According to a legend spread among the natives, this tree was cursed and turned upside down.

When young, the baobab is relatively dense and attractive. But over the years, its gray stem becomes flexible, curls and curls. Why are whales so different from other trees, and why are Australians, including Aborigines, valued and loved so much?

The shorter the better. In Australia, for many years people called it a boob. The locals joked that the Bushmen liked to shorten their names because there was a danger of accidentally sneaking into one of the many flies that are always circling around. So they shortened the word "baobab" to "show off" and the new name for the tree quickly found a place in the local language. The baobab is also referred to as the "dead rat tree". Why is this not a particularly attractive definition? In the distance, the dried fruits of the tree resemble dead rats hanging from their tails.

In addition, injured baobabs are quick to scuttle and smell like spoiled meat. However, when healthy, the colors are large, white, and fragrant. Baobab is common in the Kimberley region of Western Australia and in the neighboring state of the Northern Territory. There is a relatively short rainy season characterized by feverish monsoon rains and a dry season.

Baobab is famous for its resilience. It usually lives for centuries. Plant physiologist Hearn explains: “Even if the inside of the tree is burned or if it is cut, the baobab usually survives, and after recovering from damage, it continues to grow.” He adds: "The tree is so strong that until it is completely destroyed, it can continue to grow almost normally." Once the baobab was so determined to survive, when it was placed in a wooden container that was to be transported by sea, it fell into the ground through the slits of the container.

In the area of ​​the Kimberley Plateau there are beaches that reach a height of twenty-five meters or even more, and the circumference of their trunk reaches almost the same size. Its interior is soft and fibrous and, like a sponge, it can store vast amounts of liquid. During the monsoon rains, the baobab takes a lot of water, and its chest expands noticeably.

But in the dry season, the tree slowly regains its former size. Usually the leaves of broad-leaved trees fall before winter, and the trees survive this harsh season. Baobab leaves, however, fall during the dry season. When it comes down to it, the colors of the beans appear on the branches of the beaver and the leaves grow quickly. Because it indicates that the rainy season is coming, some locals refer to it as the tree calendar calendar.

Baobab flowers open only at night and last only a few hours. At dawn, they begin to fade. In their place, fruits gradually appear, which have a hard shell shell, and when they fall to the ground, they break, and the seeds are scattered in them.

Mobile game "Autumn Bouquet"

Aboriginal people in the Kimberley area have always considered the seeds, leaves, roots and roots of the baobab to be important food sources. Before the fruit dries, the seeds have a white fleshy part that is very palatable. In times of drought, the natives chewed pieces of the fibrous wood of the baobab and its roots, which were a source of much-needed moisture. And when rainfall was especially heavy during the rainy season, locals sometimes found water hidden in tree cavities or at the base of branches.

Because it is rich in vitamin C, the baobab fruit has helped people regain their health. In the past, both Aboriginal people and Europeans used baobab trees as bulletin boards. The ship's captain, Philip Parker King, was instructed by the admiralty to leave unambiguously visible evidence that he was on land.

A tour of this tree, which was called "Sea Cheese", was then almost nine meters, and today it is more than twelve feet. Although it is no longer so clear, the inscription continues to remind these early explorers. Other inscriptions carved on old baobabs still remain and can be seen by tourists from all over the world.

When European settlers settled in the Kimberley Plateau region, huge baobabs served road signs and meeting places, and sometimes the area around them was used for camping. Traveling pastoralists left their cattle to rest under the shade of the baobabs with interesting names such as "Hotel Orient", "Hotel Club" or "Royal Hotel".

He and his companions were about a hundred kilometers from the city of Wyndham, but to get there they had to cross crocodile rivers. Great, people found wood and tools. Then they "cut off a big baobab" and within five days they made a canoe.