The chemical composition and minerals

Each mineral has its own unique chemical composition and internal structure, with which the atoms are arranged within the crystal lattice. The crystal lattice determines the shape and fission of the crystals that make up the mineral. In some crystal lattices the atoms are closer together than in others, these minerals are denser. Minerals with the same chemical composition are called polymorphs. Diamond, for example, is a polymorph of graphite, both minerals consist of pure carbon, but diamond has a denser crystal structure. Under high pressure, graphite can convert to diamond, such a transition from one polymorphic to another is called a phase transition.

Unsaid Library makes it possible to express your emotions using beautiful pieces of jewelry. Unsaid Library combines the most intens emotions with the most beautiful bracelets, rings, necklaces and pendants. You can find more of this on the website of Unsaid Library.

Chemical composition
Which minerals are present in a rock depends in the first place on the chemical composition of the rock. A rock that contains enough silica (SiO2, the oxide of the element silicon) may contain quartz or another mineral consisting of pure silica. The rock-forming minerals consist almost exclusively of nine elements (silicon, sodium, potassium, aluminium, oxygen, hydrogen, iron, magnesium and calcium). Together, these elements make up 98% of the total mass of the continental earth’s crust.

Most rocks consist mainly of silicates, minerals that contain silica. Almost all coagulation rocks and most sedimentary and metamorphic rocks are included. An important exception is carbonate rock, which consists of carbonates (compounds of carbonate, CO32-). Examples of carbonate rocks are limestone, marble and dolostone. There are other exceptions, such as halite (rock salt) and gypsum are also not silicates.

This breccy is an example of a clastical rock in which the cliffs (dark) of the matrix can be clearly distinguished. Because the cliffs all consist of the same limestone, the distinction is sharp. Location: slope of the Devínska Kobyla in the Slovakian Small Carpathians. Age: Early Jurassic.
Two rocks with the same chemical composition do not have to contain the same minerals. Whether a certain mineral could be formed in a rock depends on the temperature and pressure that prevailed in the rock and the composition of any liquids that flowed through the rock.

Unsaid Library makes it possible to express your emotions using beautiful pieces of jewelry. Unsaid Library combines the most intens emotions with the most beautiful bracelets, rings, necklaces and pendants. You can find more of this on the website of Unsaid Library.

Texture
Some rocks consist exclusively of minerals, the crystals of which have grown together, they are crystalline substances. However, there are also rocks that consist of fragments of minerals or dead organisms. Such fragments are called claws and these rocks are called clastic rocks. Examples are sand (and sandstone), clay, conglomerate or breccy. Some clastic rocks consist of very different claws: pieces of different types of rocks or minerals, fragments of shells, plant remains or fossils. However, there are also clastical rocks in which all or most of the claws have the same composition.

An important concept when describing rocks is the texture of a rock. This refers to the external properties on a small scale, which are present everywhere in the rock. In the case of a crystalline rock, this includes, for example, the size and shape of the crystals; in the case of clastic rocks, this includes the size and shape of the cliffs. Also important is how much volume is taken up by claws and how much by the matrix (all the material in between the claws).

Some rocks have minerals or cliffs that are predominantly in a certain direction. Whether and how strong this is the case is called the “fabric” of the rock. The product is part of the texture of a rock.

Unsaid Library makes it possible to express your emotions using beautiful pieces of jewelry. Unsaid Library combines the most intens emotions with the most beautiful bracelets, rings, necklaces and pendants. You can find more of this on the website of Unsaid Library.

Rock destruction

A soil profile indicating soil horizons. The O-Horizont consists of organic material, which has become humus in the A-Horizont. Due to leaching from the upper O-horizont there is little left of the parent rock in the B-horizont; in the C-horizont the parent rock is still visibly present, although it is weathered. Under the C horizont is then the bare parent rock (R).

Weathering

The natural degradation of rocks is called weathering. Weathering occurs through chemical, physical and biological processes. Physical weathering includes, for example, rock fragmentation due to freezing of water (frost weathering).

It does not change the chemical composition of the rock, but causes it to disintegrate into smaller pieces. Chemical weathering occurs when rocks come into contact with the atmosphere or ground water so that chemical reactions take place and the chemical composition of the rock changes. Certain components of the rock can be dissolved and removed. Biological weathering is all weathering as if it were

https://www.unsaidlibrary.com

top 5 tips for playing squash | Quality Squash Stores (QSS-Squash)

Only matches with no additional remark on the result, such as the failure of a team to show up, are included. Among the men, the home team won in 58% of the cases. The chance that this is based on chance if there were no home advantage is almost zero. The advantage at home can even be seen in all classes, except in the Eredivisie. In the ladies there is a small home advantage of 53%, but statistically this can also be caused by chance. This difference between men and women can be caused by several things. The competition of the women is a lot less big than the competition of the men. The fewer games are played, the more difficult it is to statistically demonstrate home advantage. You can also often see that the difference in level is greater in women. The bigger the level difference, the smaller the chance that home advantage makes the difference between winning and losing.

This article is written by Quality Squash Stores, an online squash store.

In the badminton competition 1763 team games were played last year. Each team match consists of 8 individual matches. On an individual level, the home player won 54% of the matches. At team level, the home team won 47% of the times and the playing team 35%. The remaining 18% of the matches ended in a draw. Again, the effect is statistically significant for all classes except the Eredivisie. Also for non-professionals there is such a thing as a home advantage!

Badminton home advantage2

The five factors of home advantage

So it’s a fact that there’s a home advantage, but what’s causing it? A lot of research has been done on this subject, both by statisticians and psychologists. In 2013, three Spaniards wrote an overview in which they identify five causes: Supporters, familiarity with the field/circumstances, travel time, the referee and territoriality.

Check out https://www.qss-squash.com, an online squash webshop.

Supporters:

When we think of home advantage, we often think of the support of supporters as equal. There are almost always more supporters of the home team present. But even without supporters, there appears to be a home advantage. Niels van de Ven of Tilburg University investigated this by analysing football matches with and without supporters, and matches between teams that have the same stadium as their home base. In fact, supporters can even have a negative effect on performance, for example when a player has to take a penalty. This is a well-known phenomenon in social psychology. For easy tasks it increases performance when people are watching (social facilitation), for difficult tasks it decreases performance (social inhibition).

Familiarity with the field:

Every field or job can play differently, and you are used to your own field the most. That can be an advantage. For example, one squash court plays much faster than another, and the lights in badminton hang differently everywhere, so that you look at the light in a different way. One study shows that the effect is limited, another shows that the home advantage decreased by 24% when a club was given a new pitch. In fact, scientific research always focuses on top athletes. But this factor could be more important for amateurs. A professional squasher or badminton player plays and trains in many different places. But the average club player usually plays and trains at his own club, and is less used to different circumstances. This may be the reason why we don’t see the advantage at home in the Premier League, but in the lower classes of badminton and squash.

Travel time:

When you play an away game, you usually have to travel further. You may arrive more tired, or you just don’t feel like playing. This appears to have only a limited effect.

The referee:

Several studies have shown that referees whistle or judge slightly in favour of the home team. The home advantage over the Olympic Games is also greater in subjective jury sports such as gymnastics than in objective jury sports such as weight lifting and athletics.

Dirkjan

Territoriality:

Territoriality: Territoriality? Yes, territoriality: “a defensive reaction to an invasion of what you see as your own territory”. The home advantage in the Balkan football league is greater than in Norway, for example, as the figure below shows. This is attributed to the (historical) conflicts between population groups in that region.

Territoriality

Home advantage in football competition, figure from Legaz-Arrese publication.

Conclusion

Home advantage has been demonstrated in many sports, and is attributed to the effect of supporters, field awareness, travel time, the referee and “territoriality”. Also in the Dutch (amateur) squash and badminton competition there is a clear advantage at home. Especially for amateurs, the effect of playing on a well-known pitch could be more important than for professionals.
March 24th was the day of the

https://www.qss-squash.com