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Introduction to Water (Water and Hydrogen) Last Updated: 3rd February, 2021 Pure water is a colourless, odourless, tasteless, neutral liquid.Pure water does not exist in nature but naturally in varying degree of purity.The main sources of water include rain, springs,
Introduction to Chemical Properties of Oxygen – Oxygen is a very reactive non metal.– Many elements react with oxygen through burning to form a group of compounds called oxides.– Burning/combustion is the reaction of Oxygen with an element/substances.– Reaction in which a substance
The atmosphere is made up of air, a mixture of colourless, odorless gases which is felt as wind.There are various gases in the atmosphere a listed below with their percentage composition; There are different experiments that could be used to
An acid may be defined as a substance that turns litmus red.A base may be defined as a substance that turns litmus blue.An indicator is a substance that shows whether another substance is a base/alkaline,acid or neutral There are some common and naturally occurring acids as
(i) Solutions (solid-liquid dissolved mixture) When a solute dissolves in a solvent it forms a uniform mixture called solution. A substance/liquid in which another substance dissolves is called solvent. A substance /solid /gas which dissolves in a solvent is called
Chemistry is defined as the branch of science that deals with the structure composition, properties and behavior of matter. The Role of Chemistry in Society (i) Washing/cleaning with soap(ii) Understanding chemicals of life(iii) Baking(iv) Medicine(v) Fractional distillation of crude oil(vi)
A surd can be described as a root whose exact value cannot be found. It is an example of an irrational number; a number which cannot be expressed in the form: In getting the value of a surd, the decimal
Expansion of Algebraic Expressions Earlier, you read that: a(b + c) = ab + ac Example 1 Expand (2x – 3)(3x + 4) = 2x(3x + 4) – 3(3x + 4)= 6x2 + 8x – 9x -12= 6x2 – x – 12
A square is the result of multiplying a number by itself. Squares by Multiplication Find the Square of a) 3 , b) 14 , c) 245 a) 32 = 3 x 3 = 9b) 142 = 14 x 14 = 196c) 2452 = 245 x 245
A decimal is a fraction whose denominator is a power of 10. Express as decimal a) Express the following fraction as a decimal ⅜ Express decimals as fractions a) Express the following decimal as a fraction 0.355 b) Express the
What is Agriculture? Agriculture refers to a fundamental human activity, which i...
POPULATION STUDIES Is the general activities carried out for the purpose of acqu...
CONCEPT OF SOIL AND SOIL PROFILE Soil appears very complex and thus differe...
GROUND WATER WATER CYCLE Rain falls on the earth surface in filtrates (soaks int...
THEORIES THEORY OF ISOSTASY Denudation has been going on the continents where to...
GLOBE Is the model of the earth Earth Is ball of rock partly covered by wat...
Photograph are the true image pictures showing truly appearance of the earth’s...
What is a map? Map is a scaled conventional representation of the whole or any o...
INTRODUCTION TO SURVEYING Surveying is an art or a science of measuring and reco...
Definitions of Research – Research is the systematic investigation into a...
STATISTICS Statistics is a branch that deals with every aspect of the data. Stat...
