The science of how Messi keeps the ball close to himself photo credit: ZaleDesigns Messi is a magician with the ball at his feet. He's in my opinion the best player in the sense that he can control the ball so well, runs so fast with the ball & changes the direction at full speed like it's a walk in the park. For starters he started playing very early (at 3) which is crucial if you want to be a good player. In that aspect, he's God gifted as he had dribble skills which is genetic in my opinion. Height He is short which means a low center of gravity so it's difficult to push him off the ball. That's why we see that anyone rarely can topple him down, instead players much larger than him lose possession to him. So his short height suits his style of play & is a blessing in disguise. Change of pace Messi changes his pace really well. He starts slow and runs directly at the defender which means the defender has to stop & focus on him. When he reac...
Some Chemistry waec keypoints In 2022
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- Amines have a characteristic fishy smell
- The industrial preparation of HNO3 is carried out using Ostwald's process
- Heavy chemicals are those chemicals used in large quantities in Industries.
- The most used chemical in industries is H2SO4.
- NaOH is used for making soap
- Fine chemicals are not produced in large quantities. However, they are produced with a high degree of accuracy, e.g AgBr. Fine chemicals include drugs.
- Thermite process is used for Welding broken ends of metal parts.
- Bessemer process is used for the production of steel
- Acheson process is used to produce Graphite
- Nigerian Crude oil is called sweet because of its low sulphur content.
- Alkanals can be oxidized but Alkanones cannot, why? It is because Alkanals have an oxidizable hydrogen atom attached to the carbonyl carbon but Alkanones do not.
- Newspaper appear yellow after prolonged exposure to the Atmosphere because the bleaching action of SO2 from which they were made is reversed by atmospheric oxidation.
- Atoms with the same mass number but different atomic numbers are referred to as Isobars
- The lithosphere is composed of rocks and soil
- Aromatic compounds are those with one or more benzene rings.
- Aliphatic compounds are those with open chains as well as cyclic compounds that do not have benzene ring in their structure.
- Hydrocarbons are compounds that contain carbon and hydrogen only.
- Water is not added to acid because it could cause an explosion. Addition of water to acid is violently exothermic.
- Bunsen Burner is used for heating and for exposing items to flame
- Methane is called fire damp because it is the main cause of explosion in poorly ventilated coal mines.
- There are basically two types of radioactivity viz natural and artificial radioactivity
- Oxygen is the most abundant element in the earth crust.
- Nigerian crude oil is called light because it has a low density due to its composition of low molecular weight hydrocarbons.
- An Oxide that dissolves in water to form acid is called Acid Anhydride
- Metal is an element that ionizes by the loss of (electrons)
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