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Importance of Physical Exercise according ot age and sex

Importance of Physical Exercise according ot age and sex According to Age: Physical education is applicable for people of all ages. But programmes of physical education differ likings and dislikings for different age-groups. Not only physical exercise but also food, likings and dislikings and physical abilities are different for different age-groups. For example, physical ability of children is not equal to that of adults.  So to develop the abilies exercise through games should be introduced accordingly. Frog jumps, touch and back, crow jump or recreational games are some physical activities that can improve physical ability of children. Selection of exercise and games for adolescent should be done systematically. Standing in a line, exercise of hands and legs, running with a ball, touch and play, etc. and games and physcial exercise can be used to develop physical abilities of children. Remember, children and adolescents should not participate in weight lifting exercise. It causes h

Introduction to Chemistry

Natural science is one of the branches of science. Understanding aspects of nature by means of logic, observation, or experimentation, explaining them, and producing hypotheses about them are the areas of natural science. Chemistry is one of the branches of natural science that discusses the structure of matter, its nature, and changes. For example, coal contains carbon. Chemistry discusses how the carbon atoms reside in coal and how these atoms react with oxygen in the air when burnt and how they produce heat. All matters including animals and objects are its subject.  Natural science has branches like physics, chemistry, botany, zoology, microbiology, astronomy, soil science, etc. What is there in your food and how they are there is discussed in chemistry? Again, think of the new cycle you bought.  After some days, the iron parts of the cycle started to get rust on them. Chemistry discusses that too. Chemistry started with the creation of this world. But it is probably the moment whe

Mineral Resources: Fossils

  Chemistry Chapter - 11: Mineral Resources: Fossils 👉   All Chapter Contents   👈   1.1 Chemistry Question Bank 1.1  Chemistry Secondary Chemistr y Chapter - 1 :  Concept of Chemistry Chapter - 2 :  States of Matter Chapter - 3 :  Structure of Matter Chapter - 4 :  Periodic Table Chapter - 5 :  Chemical Bond Chapter - 6 :  Concept of Mole and Chemical Counting Chapter - 7 :  Chemical Reactions Chapter - 8 :  Chemistry and Energy Chapter - 9 :  Acid - Base Balance Chapter - 10 :  Mineral Resources: Metal - Nonmetal Chapter - 11 :  Mineral Resources: Fossils Chapter - 12 :  Chemistry in Our Lives

Chemistry in Our Lives

  Chemistry Chapter - 12: Chemistry in Our Lives 👉   All Chapter Contents   👈   1.1 Chemistry Question Bank 1.1  Chemistry Secondary Chemistr y Chapter - 1 :  Concept of Chemistry Chapter - 2 :  States of Matter Chapter - 3 :  Structure of Matter Chapter - 4 :  Periodic Table Chapter - 5 :  Chemical Bond Chapter - 6 :  Concept of Mole and Chemical Counting Chapter - 7 :  Chemical Reactions Chapter - 8 :  Chemistry and Energy Chapter - 9 :  Acid - Base Balance Chapter - 10 :  Mineral Resources: Metal - Nonmetal Chapter - 11 :  Mineral Resources: Fossils Chapter - 12 :  Chemistry in Our Lives

Mineral Resources: Metal - Nonmetal

  Chemistry Chapter - 10: Mineral Resources: Metal and Nonmetal 👉   All Chapter Contents   👈   1.1 Chemistry Question Bank 1.1  Chemistry Secondary Chemistr y Chapter - 1 :  Concept of Chemistry Chapter - 2 :  States of Matter Chapter - 3 :  Structure of Matter Chapter - 4 :  Periodic Table Chapter - 5 :  Chemical Bond Chapter - 6 :  Concept of Mole and Chemical Counting Chapter - 7 :  Chemical Reactions Chapter - 8 :  Chemistry and Energy Chapter - 9 :  Acid - Base Balance Chapter - 10 :  Mineral Resources: Metal - Nonmetal Chapter - 11 :  Mineral Resources: Fossils Chapter - 12 :  Chemistry in Our Lives

Acid-Base Balance

  Chemistry Chapter - 9: Acid-Base Balance 👉   All Chapter Contents   👈   1.1 Chemistry Question Bank 1.1  Chemistry Secondary Chemistr y Chapter - 1 :  Concept of Chemistry Chapter - 2 :  States of Matter Chapter - 3 :  Structure of Matter Chapter - 4 :  Periodic Table Chapter - 5 :  Chemical Bond Chapter - 6 :  Concept of Mole and Chemical Counting Chapter - 7 :  Chemical Reactions Chapter - 8 :  Chemistry and Energy Chapter - 9 :  Acid - Base Balance Chapter - 10 :  Mineral Resources: Metal - Nonmetal Chapter - 11 :  Mineral Resources: Fossils Chapter - 12 :  Chemistry in Our Lives

Chemistry and Energy

  Chemistry Chapter - 8: Chemistry and Energy 👉   All Chapter Contents   👈   1.1 Chemistry Question Bank 1.1  Chemistry Secondary Chemistr y Chapter - 1 :  Concept of Chemistry Chapter - 2 :  States of Matter Chapter - 3 :  Structure of Matter Chapter - 4 :  Periodic Table Chapter - 5 :  Chemical Bond Chapter - 6 :  Concept of Mole and Chemical Counting Chapter - 7 :  Chemical Reactions Chapter - 8 :  Chemistry and Energy Chapter - 9 :  Acid - Base Balance Chapter - 10 :  Mineral Resources: Metal - Nonmetal Chapter - 11 :  Mineral Resources: Fossils Chapter - 12 :  Chemistry in Our Lives

Concept of Mole and Chemical Counting

  Chemistry Chapter - 6: Concept of Chemical Counting 👉   All Chapter Contents   👈   1.1 Chemistry Question Bank 1.1  Chemistry Secondary Chemistr y Chapter - 1 :  Concept of Chemistry Chapter - 2 :  States of Matter Chapter - 3 :  Structure of Matter Chapter - 4 :  Periodic Table Chapter - 5 :  Chemical Bond Chapter - 6 :  Concept of Mole and Chemical Counting Chapter - 7 :  Chemical Reactions Chapter - 8 :  Chemistry and Energy Chapter - 9 :  Acid - Base Balance Chapter - 10 :  Mineral Resources: Metal - Nonmetal Chapter - 11 :  Mineral Resources: Fossils Chapter - 12 :  Chemistry in Our Lives

Chemical Reactions

  Chemistry Chapter - 7: Chemical Reactions 👉   All Chapter Contents   👈   1.1 Chemistry Question Bank 1.1  Chemistry Secondary Chemistr y Chapter - 1 :  Concept of Chemistry Chapter - 2 :  States of Matter Chapter - 3 :  Structure of Matter Chapter - 4 :  Periodic Table Chapter - 5 :  Chemical Bond Chapter - 6 :  Concept of Mole and Chemical Counting Chapter - 7 :  Chemical Reactions Chapter - 8 :  Chemistry and Energy Chapter - 9 :  Acid - Base Balance Chapter - 10 :  Mineral Resources: Metal - Nonmetal Chapter - 11 :  Mineral Resources: Fossils Chapter - 12 :  Chemistry in Our Lives

Chemical Bond

  Chemistry Chapter - 5: Chemical Bond 👉   All Chapter Contents   👈   1.1 Chemistry Question Bank 1.1  Chemistry Secondary Chemistr y Chapter - 1 :  Concept of Chemistry Chapter - 2 :  States of Matter Chapter - 3 :  Structure of Matter Chapter - 4 :  Periodic Table Chapter - 5 :  Chemical Bond Chapter - 6 :  Concept of Mole and Chemical Counting Chapter - 7 :  Chemical Reactions Chapter - 8 :  Chemistry and Energy Chapter - 9 :  Acid - Base Balance Chapter - 10 :  Mineral Resources: Metal - Nonmetal Chapter - 11 :  Mineral Resources: Fossils Chapter - 12 :  Chemistry in Our Lives

Structure of Matter

  Chemistry Chapter - 3: Structure of Matter 👉   All Chapter Contents   👈   1.1 Chemistry Question Bank 1.1  Chemistry Secondary Chemistr y Chapter - 1 :  Concept of Chemistry Chapter - 2 :  States of Matter Chapter - 3 :  Structure of Matter Chapter - 4 :  Periodic Table Chapter - 5 :  Chemical Bond Chapter - 6 :  Concept of Mole and Chemical Counting Chapter - 7 :  Chemical Reactions Chapter - 8 :  Chemistry and Energy Chapter - 9 :  Acid - Base Balance Chapter - 10 :  Mineral Resources: Metal - Nonmetal Chapter - 11 :  Mineral Resources: Fossils Chapter - 12 :  Chemistry in Our Lives

Periodic Table

  Chemistry Chapter - 4: Periodic Table 👉   All Chapter Contents   👈   1.1 Chemistry Question Bank 1.1  Chemistry Secondary Chemistr y Chapter - 1 :  Concept of Chemistry Chapter - 2 :  States of Matter Chapter - 3 :  Structure of Matter Chapter - 4 :  Periodic Table Chapter - 5 :  Chemical Bond Chapter - 6 :  Concept of Mole and Chemical Counting Chapter - 7 :  Chemical Reactions Chapter - 8 :  Chemistry and Energy Chapter - 9 :  Acid - Base Balance Chapter - 10 :  Mineral Resources: Metal - Nonmetal Chapter - 11 :  Mineral Resources: Fossils Chapter - 12 :  Chemistry in Our Lives

States of Matter

  Chemistry Chapter - 2: States of Matter 👉   All Chapter Contents   👈   1.1 Chemistry Question Bank 1.1  Chemistry Secondary Chemistr y Chapter - 1 : Concept of Chemistry Chapter - 2 : States of Matter Chapter - 3 : Structure of Matter Chapter - 4 : Periodic Table Chapter - 5 : Chemical Bond Chapter - 6 : Concept of Mole and Chemical Counting Chapter - 7 : Chemical Reactions Chapter - 8 : Chemistry and Energy Chapter - 9 : Acid-Base Balance Chapter - 10 : Mineral Resources: Metal - Nonmetal Chapter - 11 : Mineral Resources: Fossils Chapter - 12 : Chemistry in Our Lives

Concept of Chemistry

  Chemistry Chapter - 1: Concept of Chemistry 👉   All Chapter Contents   👈   1.1 Chemistry Question Bank 1.1  Chemistry Secondary Chemistr y Chapter - 1 :  Concept of Chemistry Chapter - 2 :  States of Matter Chapter - 3 :  Structure of Matter Chapter - 4 :  Periodic Table Chapter - 5 :  Chemical Bond Chapter - 6 :  Concept of Mole and Chemical Counting Chapter - 7 :  Chemical Reactions Chapter - 8 :  Chemistry and Energy Chapter - 9 :  Acid - Base Balance Chapter - 10 :  Mineral Resources: Metal - Nonmetal Chapter - 11 :  Mineral Resources: Fossils Chapter - 12 :  Chemistry in Our Lives

Physical change

Physical change All chemical substances consist of one or more elements. Sometimes, changes occur only in the physical conditions of a substance leaving its chemical structure unchanged. This is called a physical change. Physical change examples A solid piece of ice, if kept at room temperature, absorbs heat from the environment and gradually melts into liquid water. Again, heating liquid water up to 100°C will see the water vaporize into the air. Here, all the molecular formulas of all three - water, ice, and vapor are the same - H 2 O.  That means each molecule of them has the same two hydrogen and one oxygen atoms in them. Therefore, all three substances are the same, only their physical states are different - ice solid while water is liquid and vapor is gaseous. This kind of change is called a physical change. You May Like What is zoom? Affect vs Effect What do you understand by phosphorylation? What do you understand by anaerobic respiration? What is fein? What is FEIN? What i

What do you mean by alloy?

What do you mean by alloy? An alloy is a substance made by melting two or more elements together, at least one of them a metal. An alloy crystallizes upon cooling into a solid solution, mixture, on an intermetallic compound. The components of alloys can not be separated using physical means. An alloy is homogeneous and retains the properties of a metal, even though it may include metalloids on non-metals in its composition. Such as stainless steel, brass, bronze, white gold, etc. You May Like What is a generator?  What is the function of a generator? What do you mean by alloy? Explain the importance of recycling metal? What is galvanizing?

Explain the importance of recycling metal?

Explain the importance of recycling metal? The number of molecules of every element in the world is defined. It is not possible to produce fundamental elements. So every mineral is not infinite, they are finite. The resource of the metal will be finished within 120 - 150 years if we use the metal at the present rate. So if we extract the metal in a limited amount we can get it for many years. Besides this, recycling metal is important in solving environmental problems. It will save both money and fuel. You May Like What is a generator?  What is the function of a generator? What do you mean by alloy? Explain the importance of recycling metal? What is galvanizing?

What is galvanizing?

What is galvanizing? The method of laying zinc coating on any metal is called galvanizing. It does not require electrolysis. Zinc is coated on anyway on any metal. You May Like What is a generator?  What is the function of a generator? What do you mean by alloy? Explain the importance of recycling metal? What is galvanizing?

Liquids which are miscible

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If miscible liquids are to be separated, then this can be done by fractional distillation. The apparatus used for this process is shown in the photo and diagram in Figure, and could be used to separate a mixture of ethanol and water.  Fractional distillation relies upon the liquids having different boiling points. When ethanol and the water mixture is heated the vapours of ethanol and water boil off at different temperatures and can be condensed and collected separately.  Ethanol boils at 78 °C whereas water boils at 100 °C. When the mixture is heated the vapour produced is mainly ethanol with some steam. Because water has a higher boiling point of the two, it condenses out from the mixture with ethanol. This is what takes place in the fractionating column. The water condenses and drips back into the flask while the ethanol vapour moves up the column and into the condenser, where it condenses into liquid ethanol and is collected in the receiving flask as the distillate. When all the et

Liquids which are immiscible

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If two liquids are immiscible they can be separated using a separating funnel. The mixture is poured into the funnel and the layers allowed to separate.  The lower layer can then be run off by opening the tap as shown in Figure. You may also read Types of Computer Main components of computer systems Hardware and Software Liquids which are miscible Separating liquid mixtures Simple distillation 

Separating liquid/liquid mixtures

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In recent years there have been many oil tanker disasters, just like the one shown in Figure. These have resulted in millions of litres of oil being washed into the sea. Oil and water do not mix easily. They are said to be immiscible. When cleaning up disasters of this type, a range of chemicals can be added to the oil to make it more soluble. This results in oil and water mixing with each other. They are now said to be miscible. The following techniques can be used to separate mixtures of liquids. You may also read Types of Computer Main components of computer systems Hardware and Software Liquids which are miscible Liquids which are immiscible Simple distillation 

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