It was a joyful thing when the Federal Government announced yesterday that secondary schools will be reopened on August 4th for students in their exit classes so as to effectively prepare for the West African Examination Council (WAEC) scheduled to commence on August 17, 2020.
At this stage, WAEC candidates should ensure that they prepare adequately for the forthcoming examination, and in doing so I decided to make a compilation of two (2) practical topics in Biology and Chemistry, as well as ten (10) topics in Biology and Chemistry that you should read.
Like the saying goes: “Adequate preparation prevents poor performance”, it is expedient you brace yourself up before setting for the exam. Here are the topics you should read.
Two Practical Topics In Biology
I guess you all know how Biology practical looks like, but in case you don’t I will give you a brief explanation. In Biology practical, you will be required to get specimen which can be labeled from A to R and these specimens must be provided by the school you enrolled with. They will be placed on a desk or table on the day of the practical and you will required to identify some of them which is easy to do.
The three Biology practical topics you should read are:
Try and know the meaning of these terms: true fruit, dry dehiscent, dry indehiscent, succulent, drupe, berry, cypsela, etc. Also know the fruits that belong to these classes, their mode of dispersion, observation features, etc.
2. Classification Of Living Organisms (Taxonomy)
In this topic, WAEC normally ask for subtle differences and similarities. For classification of animals (invertebrates), ensue you know the various phyla, which are Protozoa, Coelenterata, Platyhelminthes, Nematoda, Annelids, Mollusca, Echinodermata, Arthropoda.
For classification of animals (vertebrates), ensure you know the various classes, Pisces, Amphibia, Reptilia, Aves and Mammals.
This is how it looks like:
Two Practical Topics In Chemistry
1. Volumetric Analysis (Acid-Base Titration)
The most common aspect of volumetric analysis that normally comes out in WAEC is Acid-Base titration, but sometimes they can decide to being redox titration. Ensure you learn how to write a balanced acid-base (neutralization) reaction and also how to calculate the concentration of an acid or a base.
The standard volume of pipette which is your volume of base is either 20cm³ or 25cm³. The indicator can be methyl orange, phenolphthalein or any other, depending on the nature of the acid and base.
2. Qualitative Analysis (Salt Analysis)
This aspect of Chemistry practical is very simple and you will be provided with a salt. The easiest way to do this is to divide the salt into a cation and an anion and then read on how to test for these ions.
For instance, if WAEC provides the salt copper (ii) sulphate (CuSO4), all you need do is to divide the salt into Cu²+ ion and SO4²- ion and then read on how to test for the various ions.
Also try as much as possible to read on drying agents and know the agents used to dry gases. For example, silical gel is used to dry all gases because it doesn’t react with them. A good drying agent must not read with the gas being dried.
Try to also read gases collected over water, by upward delivery (downward displacement) and downward delivery (upward displacement).
This is how it looks like:
Ten Topics In Biology You Should Read
1. Genetics and Variation
2. Organic Evolution
3. Digestive System
4. Excretory System
5. Respiratory System
6. Reproductive System
7. Cell and its Environment
9. Sense Organs
10. Hormones (Plant and Animal hormones)
Ten Topics In Chemistry You Should Read
1. Redox Reaction
3. Metals and their compounds
4. Non-metals and their compounds
5. Organic Chemistry 1 and 2
6. Acid, Base and Salt
7. Chemical Bonding
9. Kinetic Theory Of Matter and Gas Laws
If you have any issue or question in Biology or Chemistry, drop them and I promise to attend to them. Don’t forget to like and share to others.
NB: The images used in this article are for illustrative purposes, as it is not in any way suggestive of examination malpractice as the writer believes in hard work and diligence.