مقالة المستوى الثالث

in our last article talked about the reasons for change and transformation that occur to the living organism.

most of it was biology since we talked about the function of genetic in our cells and body.

but in today article we will talk a lot about the chemistry which most student hate the most because of its complexity so let us forget about the chromosomes, mitochondria and ribosomes to learn about elements and compounds.
so before that let me say that the branches of science are similar for example the biology and chemistry talks about the organic and inorganic compounds that we find in the natural environment or in our body.
the chemistry and physics talks about conducting electricity between materials ,the experiment in laboratory which need good conditions and equipment ...it is by the experiments we discover new information about our worlds.

so.....chemistry the most hated thing in school 🙂

matter has three states :solid ,liquid and gas...this is very important because chemistry and physics talks a lot about the transformation between these three states of course by the processes of: melting ,Sublimation ,deposition ,Condensation and evaporation.
what makes chemistry special it's compounds and solutions.
first the compounds we get new compound by mixing tow elements from the periodic table in process called Combination. and to separate tow materials from each other we use Decomposition this process depend on the properties of these materials and the relation between them. we usually write the relation by formula.
if we mixed a solution in a bottle we can get homogeneous or heterogeneous.
homogeneous mixture is were the substances are well combined together like sugar in tea they look like one solution but they are tow
heterogeneous mixture is were the substances are separated and not well combined like bread and meat .they don't mix into each other like cola and ice they stay separated.
add more material in any solution will increase its concentration like again more sugar in the tea will make it sweeter because by adding more sugar it concentration increase and becomes more concentrated but by adding water its concentration decrease and so it becomes a diluted solution .

thanks Mr.Tea

one last thing to talk about chemistry is acid and bases because you will study a lot about them in following years to make things simple i will just give an example about both quickly . acids like : vinegar and bases like :soap.
see you in level 4 ….... keep learning.