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What are Ecosystems? 150 150 SchoolTutoring Academy

What are Ecosystems?

An ecosystem is defined as a community of organisms living in a particular environment and the physical elements with which they interact. Ecosystems vary in size. It can be as small as a tree and as large as an ocean. Ecosystem, also known as ecological system, is an open space built by physical and biological…

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Measures of Central Tendency 150 150 SchoolTutoring Academy

Measures of Central Tendency

A measure of central tendency is a single value that describes a set of data by identifying the central position within the set of data. The mean, median and mode are the measures of central tendency. Mean The mean or average is the most commonly used measure if tendency. It is equal to the sum…

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Angles of Polygons 150 150 SchoolTutoring Academy

Angles of Polygons

Polygons are closed geometric figures made with straight lines.           Sum of interior angels The sum of the interior angles of a convex polygon of ‘n’ sides is given as: S = (n – 2) × 180° Examples: Triangle has 3 sides, sum of interior angles is (3 – 2) ×…

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Types of Polygons 150 150 SchoolTutoring Academy

Types of Polygons

The word ‘polygon’ is derived from Greek words poly- which means ‘many’ and -gon means ‘corner’ or ‘angle’. Polygons are closed (all the lines joined) geometric figures made of straight lines. Types of Polygons If all the angles and sides are equal, the polygon is called regular polygon, otherwise it is irregular. A simple polygon…

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Atoms: The Basic Building Blocks 150 150 SchoolTutoring Academy

Atoms: The Basic Building Blocks

Democritus, a Greek philosopher, developed the idea of atoms. But his idea was dismissed by other Greek philosophers.  In 1800’s, John Dalton, an English chemist performed experiments with various chemicals that showed that matter seems to consist of elementary particles. He did not know about their structure. That particle is known as at atom today.…

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States of Matter: Solids, Liquids, and Gases 150 150 SchoolTutoring Academy

States of Matter: Solids, Liquids, and Gases

Matter is anything that occupies space and has mass. Solid, liquid and gas are the most common forms (or states) of matter. Solid A solid has a certain shape and size. We need to apply force size of a solid object. For example, a wooden plank does not change its shape or size itself. The…

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Chemistry Concepts: Atomic Symbol, Atomic Number, Atomic Mass 150 150 SchoolTutoring Academy

Chemistry Concepts: Atomic Symbol, Atomic Number, Atomic Mass

An atom is a basic building block of matter around us. Each atom is consists of the fundamental particles. Electron is negatively charged, proton is positive and neutron is neutral. Electrons revolve around positively charged nucleus which is made of protons and neutrons. Atomic symbol The atoms of all the elements are represented by a…

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Conversion between Mixed Fractions and Improper Fractions 150 150 SchoolTutoring Academy

Conversion between Mixed Fractions and Improper Fractions

A fraction consists of two numbers. The number on top is called numerator and the number on the bottom is called denominator, written as:       An improper fraction has numerator greater than denominator e.g 8/5, 9/2 A mixed fraction is consist of a integer and a proper fraction e.g 3 4/6 Improper fraction…

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Adding and Subtracting Unlike Fractions 150 150 SchoolTutoring Academy

Adding and Subtracting Unlike Fractions

Fractions with different denominators are unlike fractions. They cannot be added or subtracted as they are.  They are to be converted to like fractions first which have common denominator. Then the new numerators are added or subtracted and the result is the sum of the numerators over the common denominator. There is a simple rule…

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How to Multiply and Divide Fractions 150 150 SchoolTutoring Academy

How to Multiply and Divide Fractions

Multiplication of  fractions While multiplying fractions, the product of the numerators forms the numerator of the resultant fraction and the product of the denominators forms the denominator of the final fraction.               Division of fractions As we know division is opposite of multiplication so is the division of fractions.…

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