Rocks and Fossils for Children
We study such amazing and different rocks. Before the children who pay attention to the details of the world around them, including the stones, sooner or later the question will arise: why are the stones different?
And if the difference in the representatives of the plant world is explained by different conditions of their growth and situational variability, the difference in the appearance of stones is explained by their origin.
we study rocks
As a rule, when it comes to stones, each child has an image of mountains and rocks. Therefore, rocks for children are usually more interesting than the rest; they are happy to study the origin of rocks.
Rocks, depending on their origin, are divided into three groups:
Sand and stones are gradually washed out from the mountains because of the rain and wind. Rivers and streams wash them into the sea. They accumulate there layer by layer, solidifying.Thus,sedimentary rocksare formed at the bottom of the sea. If after a while the sea dries up, the sedimentary rocks form the basis of the land.
Look how it happened:
erosion of rocks
Stones and sand are washed away by rain
Sand and silt are carried to the seas
Layer by layer, sedimentary rock is formed on the seabed
Rocks and soils on the cut of the ravine
It is very interesting for the children to represent IRS, when there was a rapid formation of the crust. It was then that as a result of earthquakes the upper layer of our planet formed endless folds, from which subsequently separated giant slabs and went into each otherfriend. The folds, which have not lost their connection with the inner layer of the Earth - the mantle, where hot lava is boiling, as a result became volcanoes. Erupting through the mouth of a volcano, lava fell to the surface of the land, where, due to temperature and contact with air, it hardened, turning intoigneous rocks: granite, pumice, basalt, obsidian.
On the land surface, these rocks were exposed to the constant action of air, wind, moisture. Moisture fell on them in the form of raindrops and splashes of seas and oceans, covering most of the surface of the planet. Under the influence of these natural forces, the igneous rocks became more fragile and crumbled over time.
Formation of igneous rocks
But not only external forces could affect the stones. If any sedimentary rock again fell into conditions of elevated temperature and pressure, it underwent changes and becamemetamorphic.
At this level, rocks are presented for children in grade 2; Rocks for children of the 3rd class are studied more deeply, with the name of the main representatives, with the inclusion of such a concept,as “fossils.”
Fossils for children is a very interesting and intriguing concept. It allows you to feel a subtle connection with the past and to be convinced of the existence of forms of animals and plants that are no longer present in our time. That is why the study of fossils is advisable to conduct in grade 3, when the program of the cycle "world around" are studied the main representatives of the animal kingdom.
Fossils are the remains of organisms (plants and animals), which were enclosed between layers of rock.
The shell is covered with a layer of sand
Conditions that are created inside the rock, They make it possible for most of the chemical compounds of which these creatures were made.
The shell remained in the hardened rock
Thanks to this ability of the stones to preserve the representatives of the animal and vegetable kingdoms,today scientists have the opportunity to get an idea of the population of the ancient world.
The Petrified Skeleton of a Dinosaur
Help for a Young Geologist: / p>
In the third grade, usually other qualities of rocks are also considered, considering them from the point of view of practical advantage for man: rocks are represented as resources for the life activity of the population of the planet.Thus, the importance of stones used in the construction of buildings, in the creation of cultural monuments is being studied. Particular attention is paid to the process of mining. If the child has already got an idea of how different types of rocks occur and what qualities they possess, he easily masters the material of the school program.
Date: 10.10.2018, 12:25 / Views: 74545
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