A metal typically is a hard, shiny and strong element that is able to conduct heat and electricity.
Iron is the most commonly used metal in the world in which we live, though not in its pure form. When iron is combined with a small amount of a non-metal like carbon we obtain an
alloy .
The
study of metals is known as
metallurgy .
Gold is generally regarded as a metal that symbolizes wealth and prosperity, while
platinum and
palladium are valuable because of their use in electronics and specialized engineering.
Steel is known everywhere and millions of tons of steel are used annually to manufacture items such as washing machines, cars, ships and trains.
Stainlesssteel is also used for cutlery. For this, it is made into an alloy with the use of hard, shiny
chromium .
A variety of substances can be added to iron to form
alloys , e.g. manganese, phosphorus, silicon and sulphur.
Aluminium , again, is used extensively for cold drink cans, ladders and objects that are required to be light and rust free. Aluminium is the third most common chemical element on earth as much of the earth’s crust is made up of it. Copper and magnesium are usually added to aluminium to make it suitable for industrial use.
Metals can be recycled successfully to protect our natural resources – the gold and silver used in electrical circuits (and in false teeth!), particularly.
Bronze – a mixture of copper and tin - is one of the most ancient of alloys.
Brass is an alloy of copper and zinc.
Class activity
Recognition of metals and non-metals
Identify as many substances as possible from the illustration and classify them as metals and non-metals according to the main element of their substance.
1. Which feature did you consider to determine whether substances were metals or non-metals?
2. Do you think the secretary is prosperous? Provide a reason for your answer?
3. Which substance is taking over from this metal in industry? From what is it made?
4. What is metallurgy?
5. What is steel?
6. The following are the distinctive features of metal. Write down the distinctive features for non-metals:
METALS
hard and shiny
pliable and malleable
conducts heat
conducts electricity
7. What is the difference between pliable and malleable?
Assessment of recognition
Were you able to do the classification correctly and to apply your knowledge?
The lymphatic system plays several crucial roles in the human body, functioning as a key component of the immune system and contributing to the maintenance of fluid balance. Its main functions include:
1. Immune Response: The lymphatic system produces and transports lymphocytes, which are a type of
asegid
to transport fluids fats proteins and lymphocytes to the blood stream as lymph
Anatomy is the study of the structure of the body, while physiology is the study of the function of the body. Anatomy looks at the body's organs and systems, while physiology looks at how those organs and systems work together to keep the body functioning.
Enzymes are proteins that help speed up chemical reactions in our bodies. Enzymes are essential for digestion, liver function and much more. Too much or too little of a certain enzyme can cause health problems
Kamara
yes
Prince
how does the stomach protect itself from the damaging effects of HCl
the normal temperature is 37°c or 98.6 °Fahrenheit is important for maintaining the homeostasis in the body
the body regular this temperature through the process called thermoregulation which involves brain skin muscle and other organ working together to maintain stable internal temperature
