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Transport Layer: Layer 4 of the OSI model - ICT Ecological pyramid explained with its importance and limitations - Biology Importance of immunization - Basic Science Postural defects that affect the spine or backbone - PHE Types of Carbohydrates: Monosaccharides and Polysaccharides - Basic Science Carbohydrates: Disaccharides and Oligosaccharides - Basic Science Importance of forest: Forest reserves in Nigeria - Agricultural Science Wildlife reserves in Nigeria and its importance - Agricultural Science Belt Drives: Types of belt drive - Basic Technology Cooperation in civic education - Civic Education Solutions to air pollution - PHE Business Structure: What is a business structure? - Business Studies Advantages and Disadvantages of franchise - Business Studies Why does suffering and pain exist? - CRS Angles: Type of angles based on degree measurement - Mathematics Angle Pairs: Types of angle pairs - Mathematics Arms of Government: Functions of the Executive, Legislature and Judiciary - Government Le Chatelier's Principle: Changes in concentration and pressure in dynamic equilibrium - Chemistry Chemical Equilibrium: Dynamic Equilibrium in Chemistry - Chemistry Static and Dynamic Equilibrium explained with their Differences - Chemistry Child marriage and its consequences - Social Studies Consequences of Female Genital Mutilation - Social Studies Forgiveness: Jesus' teaching on Forgiveness and its importance - CRS What is Forgiveness? Jesus' teaching on Forgiveness - CRS Advantages of Inflation - Economics Disadvantages of Inflation - Economics Concept of Inflation in Economics - Economics Hindbrain: Medulla Oblongata and its features - Biology Principle of Marketing: People as a Marketing Mix and their Importance - Commerce Len Academy Examination Questions for Basic Science, JSS2, 2nd Term - Basic Science Food web explained with examples - Biology Scheme of work for Economics, SS1, First Term - Economics Scheme of work for Economics, SS1, Second Term - Economics Scheme of Work for Economics, SS1, Third Term - Economics Branches of Geography: Physical and Environmental Geography - Geography Ceramics: Types of Ceramics - Basic Technology Advantages and Disadvantages of Chain drives - Basic Technology Len Academy Examination Questions for Basic Science, JSS3, 3rd Term - Basic Science Len Academy Examination Questions for Basic Science, JSS3, 2nd Term - Basic Science What is a franchise? Types of franchise - Business Studies What is Honesty? Who is a Dishonest Person? Consequences of Dishonesty - Civic Education What is Corporation? Types, Advantages and Disadvantages of Corporations - Business Studies Scheme of Work for Government, SS1, First Term - Government Scheme of Work for Government, SS1, Second Term - Government Scheme of Work for Government, SS1, Third Term - Government What is Limited Liability Company? Its Advantages and Disadvantages - Business Studies Partnership in Business: Types, Advantages and Disadvantages - Business Studies Principle of Marketing: Positioning as a Marketing Mix - Commerce Principle of Marketing: Packaging as a Marketing Mix - Commerce Chemistry Scheme of Work, SS1, First Term - Chemistry Chemistry Scheme of Work, SS1, Second Term - Chemistry Chemistry Scheme of Work, SS1, Third Term - Chemistry Literature in English Scheme of Work, SS1, 1st Term - Literature in English Literature in English Scheme of Work, SS1, 2nd Term - Literature in English Literature in English Scheme of Work, SS1, 3rd Term - Literature in English Characteristics of Double Entry System - Accounts Examples on the Principle of Double Entry System - Accounts Advantages and Limitations of the Double System in Accounting - Accounts Elements of Promotion in Marketing Mix - Commerce Principle of Marketing: Promotion as a Marketing Mix - Commerce Biology Scheme of Work, SS1, First Term - Biology Biology Scheme of Work, SS1, 2nd Term - Biology Biology Scheme of Work, SS1, 3rd Term - Biology Prevention and Control of Crop Pests - Agricultural Science Economic Importance of Crop Pests - Agricultural Science Phrase: Types of Phrase - English Len Academy Questions for Basic Technology JSS3, 2nd Term, 2020 - Basic Technology Len Academy Question for Basic Technology, JSS3, 2nd Term, 2020, Part 2 - Basic Technology Classification of Insect Pests and their Economic Importance - Agricultural Science Jesus' teaching on Giving - CRS Concept, Advantages and Disadvantages of Multi-Party System - Government Belt and Pulley Drives: Types of Belt in Belt Drives - Basic Technology Seminal Vesicles and Bulbourethral Glands as Male Accessory Sex Organs - Biology Principle of Marketing: Place as a Marketing Mix - Commerce Agricultural Machines and their Uses - Agricultural Science Clause and Types of Clause explained - English Derived Units: Similarities and Differences with Fundamental Units - Physics Concept, Advantages and Disadvantages of Two-Party System - Government Male Reproductive System: Scrotum and its contents - Biology Principle of Marketing: Price as a Marketing Mix - Commerce Principles of Marketing: The 7 Ps of Marketing Mix - Commerce Conversion of Number Bases explained with examples - Mathematics Soil Erosion: Causes of Soil Erosion - Agricultural Science Ways to prevent Soil Erosion - Agricultural Science Essay: How to write the major types of essay - English Healthy Self-esteem: Characteristics and Benefits of Healthy Self-esteem - Social Studies Causes of Environmental Problems - Social Studies Effects of Environmental Problems and Solutions to Environmental Problems - Social Studies Compounds in Chemistry: Characteristics of Compounds - Chemistry Types of Mixture: Homogenous and Heterogeneous Mixtures - Chemistry Mixtures: Characteristics of Mixtures - Chemistry Functions of the Wholesaler - Economics Advantages and Disadvantages of the Wholesaler - Economics Wholesale Market: Who is a Wholesaler? - Economics Characteristics of the Wholesaler - Economics Brain: Introduction to the Human Brain - Biology Forebrain: Lobes of the Cerebrum and their Functions - Biology Cerebellum: Parts and Functions of the Cerebellum - Biology Midbrain: Division and Functions of the Midbrain - Biology Negative Feedback Mechanism in Homeostasis - Biology Factors necessary for Division of Labour - Commerce Disadvantages of Division of Labour - Commerce Advantages of Division of Labour - Commerce Arterial Disorders: Characteristics and Causes of Arterial Disorders - Biology Consequences of Drug Trafficking and Solutions to Drug Trafficking - Social Studies Drug Trafficking: Reasons for Drug Trafficking - Social Studies Gravity: Interesting facts on Gravity - Physics Asexual Propagation in Plants, Types and Examples - Agricultural Science Differences between Gymnosperms and Angiosperms - Agricultural Science Relative Density of Substances and Specific Gravity - Physics Retail Market: Who is a Retailer and Examples of Retailers - Economics Market: Types of Market - Economics Market - What is a Market in Economics? - Economics Self-esteem: How to overcome Low Self-esteem - Social Studies What is Low Self-esteem? Characteristics of Low Self-esteem - Social Studies Low Self-esteem: Causes of Low Self-esteem - Social Studies Physical Properties of Matter explained with Examples - Chemistry Chemical Properties of Matter explained with Examples - Chemistry Differences between Physical and Chemical Change - Chemistry Outbound Marketing explained - Commerce


The tennis grand slam tournament played on a grass court is the _____.

  • A. US Open

  • B. Australian Open

  • C. Wimbledon

  • D. French Open

  • E. Italian Open

  • F. English Open

PHE

ANSWER: Wimbledon

The game of tennis has 4 grand slam tournaments. These are:

  1. Australian Open: Played on hard court

  2. US Open: Played on hard court

  3. French Open: Played on clay court

  4. Wimbledon: Played on grass court

Please read more on the beautiful game of tennis here

Which of the following sport personnels isn't a notable female tennis player? (The firstname had been abbreviated in the options below).

  • A. S. Tsitsipas
  • B. M. Navratilova

  • C. M. Hinges

  • D. M. Sharapova

  • E. V. Williams

  • F. N. Osaka

PHE

ANSWER: S. Tsitsipas

Stefanos Tsitsipas is a male tennis player.

Below are the full names of notable female tennis players in the options (from the question):

  • Martina Navratilova
  • Martina Hinges
  • Maria Sharapova
  • Venus Williams
  • Naomi Osaka

Please read more on the beautiful game of tennis here

Which is the most economical of all power transmitting drive mechanisms?

  • A. Pulley drive

  • B. Gear drive

  • C. Chain drive

  • D. Belt drive

  • E. Thread drive

  • F. Fabricated drive

Basic Technology

ANSWER: Belt drive

Belt drives are the most economical in mechanical power transmission. This is one of the advantages it's got over other means power transmissions in drive mechanisms.

Please read more on the advantages and disadvantages of belt drives here

Meanwhile, understand that there's nothing like thread or fabricated drives in power transmission.

Which of the following is false concerning  drive mechanisms in machines?

  • A. Pulley drives do not require a means of power transmission

  • B. Gear drive is a means of power transmission

  • C. Chain drive is a means of power transmission

  • D. Belt drive is a means of power transmission

  • E. The drive mechanisms of machines accomplishes it's function via a rotational motion

  • F. Drive mechanisms results into a mechanical movements of machines via power transmission

Basic Technology

ANSWER: Pulley drives do not require a means of power transmission

Pulley drives or systems requires a means of power transmission. Infact, they refer to a wheel of sets of wheel over which a belt or chain (as means of power transmission) is attached in order to create a mechanical movement or motion.

Understand that it's the drives in pulley systems that brings about mechanical power transmission. Instances of such drives include the belt drives, chain drives and gear drives respectively.

Please read more on the concept of drives and pulley systems here

Arrow head lines - Len Academy

The lines above are used at the end of dimension lines?

  • A. True

  • B. False

Basic Technology

ANSWER: True

The lines shown in the above diagram are arrowhead lines and the are used at the end of dimension lines (for measurements).

Please read more on type and uses of lines in technical drawings here

Which of the following is not a characteristics of commerce?

  • A. The only aim of commerce is to make profit

  • B. It is a discontinuous process after profit had been made

  • C. It is accompanied with challenges and uncertainties

  • D. It is 100% business and economic activity

  • E. Transaction processes are always involved in commerce

  • F. It connects the process of production and marketing

Commerce

ANSWER: It is a discontinuous process after profit had been made

Commerce is always a continuous process. This is true because human needs and wants are always unlimited.

You can read on scale of preference and opportunity cost here

Which of the following is not a function of commerce?

  • A. Unnecessary in times of emergencies like earthquakes and wars

  • B. Facilitates mass production of goods

  • C. Influences transportation network within and outside a state

  • D. Attempts to satisfy human needs and wants

  • E. Improves the standard of living

  • F. Acts as an online business link between buyers and sellers

Commerce

ANSWER: Unnecessary in times of emergencies like earthquakes and wars

Commerce is necessary and important in times of emergencies like wars, earthquakes, famines and hurricanes.

Without commerce at these perilous times (as listed above), the victims may die from lack of food and proper medical treatment, both of which are made possible via commercial activities.

Please read on the functions of commerce here

Gymnosperms and angiosperms are seed bearing plants under the division spermatophyta?

  • A. True

  • B. False

Agricultural Science

ANSWER: True

Gymnosperms and Angiosperms are seed bearing plants. Both are categorized as plants (under kingdom plantae). Similarly, both belong to the division spermatophyta (which are seed bearing plants). However, fruits are formed in angiosperms only (and not gymnosperms).

Please read more on the differences between gymnosperms and angiosperms here

Which of the following is false concerning gymnosperms?

  • A. Cones are present

  • B. Sepals are present

  • C. Petals are absent

  • D. Only seeds are produced

  • E. Sporophyll form the cones

  • F. In seed formation, the ovules aren't present in the ovary

Agricultural Science

ANSWER: Sepals are present

Gymnosperms are flowerless plants. Instead of flowers, the have got special structure called cones and these are formed from the sporophylls.

The lack of flowers in gymnosperms have got various implications. For instance, they lack the floral parts of a flower, that is: sepals, petals, stamen and carpels. In addition, the germinating seed lack ovules in the ovary, thus bringing about a lack of fruit in gymnosperms.

In flowering plants (angiosperms), the ovules becomes the seeds and the ovary, the fruit.

Please read on the differences between gymnosperms and angiosperms here

The words massacre and bloodbath are _____.

  • A. Antonyms

  • B. Synonyms

  • C. Homonyms

  • D. Homophones

  • E. Heteronyms

  • F. Heterophone

English

ANSWER: Synonyms

Words or expressions with similar meanings are termed synonyms. Below are some examples of synonyms:

  • Sick - Ill

  • Right - Correct

  • Add - Plus

  • Subtract - Minus

  • Close - Near

Please read more on Synonyms here

_____ are words or a phrases or expressions that have an exact or closely related meaning with another word or phrase or expression

  • A. Antonyms

  • B. Synonyms

  • C. Homonyms

  • D. Homophones

  • E. Heteronyms

  • F. Heterophones

English

ANSWER: Synonyms

Words or expressions with similar meanings are termed synonyms. Below are some examples of synonyms:

  • Disappear - Vanish

  • Pain - Agony

  • Confirm - Ratify

  • Versus - Against

  • Respect - Honour

Please read more on Synonyms here

Concerning the biblical account of first human disobedience, which of the following statement is false?

  • A. The snake began its temptation by asking the woman: 'Did God really tell you not to eat fruit from any tree in the garden?'

  • B. The snake lied to the woman that she won't die when she eats the fruit

  • C. The woman ate the fruit because she she saw how beautiful the tree was and how good its fruit would be to eat

  • D. The woman ate the fruit and gave some to her husband, after which they were given understanding

  • E. The fruit eaten by the woman was an apple and it looked pleasing to the eye

  • F. The snake was the most cunning animal that the Lord God had made

CRS

ANSWER: The fruit eaten by the woman was an apple and it looked pleasing to the eye

The bible did not record the name of the fruit eaten by the woman. However, the tree that bears this fruit was present in the middle of the garden.

Please read more on the biblical account of first human disobedience here

That same evening when Adam and Eve ate the fruit in middle of the garden, What was God's first action?

  • A. God called out to Adam and Eve

  • B. God cursed the serpent, Adam and Eve respectively

  • C. God called out to man and asked him: 'Where are you?'

  • D. God expressed his disappointed to Adam

  • E. God declared his anger to man

  • F. God called out to Adam and Eve and punished them immediately

CRS

ANSWER: God called out to man and asked him: 'Where are you?'

  • That evening they heard the Lord God walking in the garden, and they hid from him among the trees. But the Lord God called out to the man, 'Where are you?' He answered, 'I heard you in the garden; I was afraid and hid from you, because I was naked.' 'Who told you that you were naked?' God asked. 'Did you eat the fruit that I told you not to eat?' The man answered, 'The woman you put here with me gave me the fruit, and I ate it.' The Lord God asked the woman, 'Why did you do this?' She replied, 'The snake tricked me into eating it.'

    Genesis 3:8-13

Please read on the biblical account of first human disobedience here

Which of the following isn't a measure to prevent domestic accidents?

  • A. Alertness and use of common sense when doing things

  • B. Drugs should be kept of out reach of children

  • C. All electrical issues should be fixed by parents only

  • D. Living rooms, rest rooms, stores, bathrooms and kitchen should be properly lighted

  • E. Babies should be closely monitored by parents

  • F. Families should be oriented on the basic home safety rules

PHE

ANSWER: All electrical issues should be attended to by parents only

To minimize or prevent domestic accidents, all electrical issues should be attended by electrical professionals.

Which of the following is false concerning domestic accidents?

  • A. They are preventable

  • B. They always occur inside our homes

  • C. They occur within our environment

  • D. Food can lead to domestic accidents

  • E. Carelessness is a major cause of domestic accidents

  • F. According to reports, it is considered as one of the 4 major causes of death around the world

PHE

ANSWER: They always occur inside our homes

Domestic accidents are not necessarily accidents that occur inside our homes. They may also occur in our environment or neighborhood.

Domestic accidents can be caused in a variety of ways. Some of these include: carelessness, non use of home slippers, flammable substances, food, sharp objects and so on.

Please read more on domestic accidents here

The simplest formula of a compound is termed _____.

  • A. Emperical formula

  • B. Molecular formula

  • C. Avogadro's number

  • D. Mass formula

  • E. Molar mass formula

  • F. Mole ratio

Chemistry

ANSWER: Emperical formula

The emperical formula of a compound is defined as that which shows only the relative number of atoms of each element present in a compound.

Understand that the emperical formula of a compound is always the simplest formula of such compound and is derived from experimental data and analysis.

You can read on emperical formula here

A compound composed of iron (Fe) and oxygen (O) was analyzed and found to contain 69.94% iron and 30.06% oxygen. Find the empirical formula of the compound. (Molar mass of Fe=55.85, O=16)

  • A. FeO

  • B. Fe2O3

  • C. Fe3O4

  • D. FeO2

  • E. Fe3O6

  • F. Fe2O4

Chemistry

ANSWER: Fe2O3

Step 1: Identify the given parameter from the question.

Fe = 69.94%,   O = 30.06%.

Empirical formula = Fe?O?

 

Step 2: Convert the percentages to gram. (just attribute grams to the %).

69.94% = 69.94g while 30.06% = 30.06g

 

Step 3: To get the mole ratio of each element, convert the gram to moles using the formula (mole = mass/molarmass). Please merorize this formula because we always work with moles in Emperical Formula.

Mole of Fe: 69.94/55.85 = 1.252mol

Mole of O: 30.06/16 = 1.879mol

 

Step 4: Divide both sides by the smallest mole ratio.

Iron has the smallest mole ratio in our case, therefore: 1.252/1.252 = 1,    1.879/1.252 = 1.5

We now have the formula = Fe1O1.5

 

Step 5: Multiply each of the moles by the smallest whole number that will convert each into a whole number. (In our case, the number '2' is the smallest whole number that will make '1.5' and '1' whole numbers when multiplied by it.

For iron (Fe), we will have 1 x 2 = 2

For oxygen (O), we will have 1.5 x 2 = 3

 

Step 6: Write the empirical formula.

The empirical formula= Fe2O3

Iron(III)tetraoxosulphate(VI)

Brachiation is a specialized form of movement exhibited by _____.

  • A. Human beings

  • B. Babbons

  • C. Chameleons

  • D. Toads

  • E. Millipedes

  • F. Birds

Basic Science

ANSWER: Babbons

Brachiation is a specialized form of movement whereby animals swing from one tree branch (or projection) to another. It may also be referred to as arm swinging.

The choice of movement in babbons is brachiation.

_____ is a form of locomotion whereby an organism move by means of its two hind limbs.

  • A. Pedalism

  • B. Duo Pedalism

  • C. Double Pedalism

  • D. Dual Pedalism

  • E. Bipedalism

  • F. Copedalism

Basic Science

ANSWER: Bipedalism

Bipedalism is a form of locomotion whereby an organism move by means of its two hind limbs.

Interestingly, humans are unique in the sense that they are the only animals that can efficiently move in an upright manner with both feet.

Please read more on the uniqueness of man here

The human brain is folded into gyri, grooved into sulci and also the most developed among all organisms in the universe.

  • A. True

  • B. False

Basic Science

ANSWER: True

Among all organisms in the universe, the human brain is the most developed. This is infact the biggest factor that makes human being unique from every other organism on earth.

Below is an image of the human brain:

Human brain - Len Academy

According to science, all human beings are animals.

  • A. True

  • B. False

Basic Science

ANSWER: True

Basic science and biology teaches us that human beings belong to the kingdom animalia. This makes them animals (since all organisms belonging to the kingdom animalia are termed animals).

However, it is important to state that human beings are higher animals.

Please read on the uniqueness of man here

Pice elasticity of supply - Len Academy

The above diagram on the quantity supplied against a change in price is _____.

  • A. Elastic

  • B. Inelastic

  • C. Perfectly Elastic

  • D. Perfectly Inelastic

  • E. Zero Elastic

  • F. Unitary Elastic

Economics

ANSWER: Unitary Elastic

The graph above shows a Unitary Price Elasticity.

A unitary price elasticity of supply is seen when a change in price brings about a corresponding and proportional change in the quantity of goods and and services supplied. Its value is always equal to one (1)

Please read more on the types of price elasticity here

The rate at which an increase in the price of a product translate into the product's increased production and availability in the market is termed _____.

  • A. Demand

  • B. Supply

  • C. Demand Elasticity

  • D. Supply Elasticity

  • E. Demand Curve

  • F. Supply Curve

Economics

ANSWER: Supply Elasticity

Supply elasticity (also termed elasticity of supply or price elasticity of supply) is defined as the rate at which an increase in the price of a product translate into the product's increased production and availability in the market.

Understand that apart from price, other factors may also be used to measure the elasticity of supply, but ideally, price is always preferred as it's tool of measurement.

Please read on the concept of price elasticity here

Twitter was launched in _____.

  • A. 2003

  • B. 2004

  • C. 2005

  • D. 2006

  • E. 2007

  • F. 2008

ICT

ANSWER: 2006

Twitter is a micro-blogging social media platform launched in 2006 by its founder, Jack Dorsey. He made the first tweet which reads: 'Just setting up my twttr'.

Please read on the internet, world wide web and various internet terms here

Due to the limitation of the Internet Protocol version 4 address, _____ was created.

  • A. IPv5

  • B. IPv6

  • C. IPv7

  • D. IPv8

  • E. IPv9

  • F. IPv10

ICT

ANSWER: IPv6

The Internet Protocol version 6 (IPv6) address is a very large pool of addresses created to cover up the limited Internet Protocol version 4 (IPv4) addresses.

Understand that every computer or internet enabled device requires an Internet Protocol (IP) address to connect to the internet.

Interestingly, the number of internet enabled devices and objects are constantly increasing, thus giving rise to the creation of an unbelievably large pool of address termed IPv6.

Due to the limitation of the Internet Protocol version 4 address, _____ was created.

  • A. IPv5

  • B. IPv6

  • C. IPv7

  • D. IPv8

  • E. IPv9

  • F. IPv10

ICT

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Quotes for Students

The first problem for all of us, men and women, is not to learn, but to unlearn - Gloria Steinem

The act of unlearning is an excellent form of learning. Infact, you will need the skills of unlearning if you intend to become an expert in your desired field.

Do yourself a favor by unlearning, learning and re-learning on a daily basis

If you don't design your own life plan, chances are you'll fall into someone else's plan. And guess what they have planned for you? Not much - Jim Rohn

There's something special about you. It doesn't matter whether you work for a company or someone; what matters is the amount of investment you've made on yourself.

Investing in yourself is the best life plan you can design for your future

Smile - Len Academy

Peace begins with a smile - Mother Teresa

Never underestimate the power of your smile. It can lift up the depressed, improve the mood of the downtrodden and even discourage a suicidal attack. Also remember that your smile makes you more beautiful

Smile always for your own good and the good of others

The only person who is educated is the one who has learned how to learn …and change - Carl Rogers

To perfect your learning process, you must learn, unlearn and re-learn. Infact, we all need to learn how to unlearn those vices we know about ourselves.

Do you know that seeing the devastating consequences of vices (perhaps in movies or real-life) can initiate the unlearning processes in one who does such?


Key Points for Students

God created human beings for the following reasons:

  1. To know Him

  2. To love Him

  3. To serve Him

  4. To be happy with Him forever

Our first parent, Adam and Eve enjoyed a life of complete happiness before they committed sin. They never knew what pain nor sorrow was until they disobeyed God. In short, both were perfect beings until they committed the sin of disobedience against God.

Disobedience may simple be defined as the failure to obey rules, command or someone in authority.

Adam and Eve were the first human beings to disobey God.

Please read more on the biblical account of first human disobedience here

CRS

Adam and Eve were able to commit sin (disobey God's command) because God had given them that special gift of free will.

The events written in Genesis 3:1-13 presents the story of the first human disobedience.

Now the snake was the most cunning animal that the Lord God had made. The snake asked the woman, 'Did God really tell you not to eat fruit from any tree in the garden?'

Genesis 3:1

Moral Lesson: The devil can come in any form and can tempt any man, woman, boy or girl, as far as he or she is of the age of reasoning.

Sometimes, satan creeps into one's life by asking simple questions. Notice that the snake (satan) did exactly this when it approached Eve to tempt her. To this end, we need to be at alert prayerfully because the evil one can tempt any human in any situation, place and at any point in time

CRS