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
Addition and Subtraction It should be noted that:a) + – = –b) – + = –c) – – = +d) + + = + As a student, please try: ( For this questions, please draw a number line as the one shown above from -14 to +14 )i) 4 + 8ii) -4 + 8iii)
Translation is a process by which ideas that are written in one language ar...
Are the abilities that allow you to write effectively and concisely. A competent...
Reading is the process of going through written information or piece of wor...
What is Speaking? SPEAKING SKILLS: Speaking is simply the act of talking wh...
Listening is ability to accurately receive and interpret messages in the communi...
This is the field or branch of morphology which studies different principles or ...
Language is a symbol system based on pure or arbitrary conventions…...
Ecology is the study of the interactions between living things, such as humans, ...
EVOLUTION Evolution is a change in the genetic composition of a population...
Genetics is the study of heredity and variationHeredity- is the passage of chara...