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Planets can be categorized based on their composition. These include:

1. Terrestrial or Rocky Planets: They are mercury, venus, earth and mars. They are called terrestrial or rocky planets for the following reasons:

  • They have a rocky and compact surface.

  • They have no rings around them.

  • They have a few natural satellites.

  • They rotate slowly around their axis.

 

2. Gas or Jovian Planets: They include jupiter, saturn, uranus and neptune. They have the following features:

  • They are called jovian planets because they are bigger in size when compared to earth.

  • They are composed mainly of hydrogen and helium gas, hence the name 'gas planets' or 'gas giants'.

  • They rotate rapidly.

  • They have many satellites.

  • They have rings around them.

Please read more on the classification of planets here.

Geography

Planets of the Solar System - Len Academy

The following rules are required for a body to become classified (or regarded) as a planet:

  • It must orbit the sun.

  • It does not orbit another planet. This means that it must not be a satellite.

  • It must have sufficient mass which accounts for its self-gravity.

  • It must assume a nearly round shape.

Please read on the planets of the solar system here.

Geography

The Standard International (SI) unit for density is kilogram per cubic metre (Kg/m3).

The table below shows various substances with their densities:

Substance

Density (Kg/m3)

Helium

0.179

Air (1atm and 20oC)

1.20

Bamboo Wood

400

 Ethanol

810

Methylated Spirit

800

Benzene

900

Paraffin Wax

900

Ice

920

Water (Fresh Water)

1000


Please read on density here

Physics

Force can be balanced or unbalanced.

When forces from different directions act on an object and consequently bring about the object's motion, then such forces are unbalanced.

Conversely, if theses forces bring about zero motion (static position or no movement) on the object of reference, then it's a balanced force.

In summary,

  • An apple hanging on a tree (without any form of movement) has a balanced force.

  • An apple falling from a tree has an unbalanced force.

Physics

Below are characteristics of gymnosperms:

  1. Their seeds have cones that protect them.

  2. Sepals and petals aren't present in their cones.

  3. Stigma and style are absent.

  4. They do not produce fruits. Only seeds are formed.

  5. Companion cells are absent.

  6. Sporophyll form the cones.

  7. Anther and filament are absent.

  8. The ovules are not present in the ovary.

  9. Gymnosperms do not possess flowers.

  10. Please read on the anatomical differences between gymnosperms and angiosperms here

Agricultural Science

Below are the physical properties of metals:

  1. They exist in solid state.

  2. The have high densities.

  3. They are good conductors of heat and electricity.

  4. The have the ability to be polished, to glow, sparkle and reflect light.

  5. They can be bent, flattened and made into sheets called foils.

  6. They can be drawn into wires.

  7. Iron undergoes magnetism while most metals are poorly magnetized.

  8. They typical have high melting point.

  9. They generally have high boiling point.

  10. With the exception of lithium, sodium and potassium, most metals are generally hard.

  11. They have the ability to make sound when in contact with other objects or metals.

  12. Please read details on the physical properties of metals here

Chemistry

John Dalton is an English chemist who brought clarity into the composition of matter and the basis for their chemical reactions.

Below are Dalton's Atomic Theory:

  1. All matter consists of tiny indivisible particles called atoms.

  2. Atoms of the same element are identical to each other in every aspect because they have the same shape and mass, while atoms of different elements are different in all respect.

  3. Atoms are indestructible and can neither be created nor destroyed.

  4. Atoms of different elements can combine with each other in simple whole number ratios to form compounds.

  5. Atoms of the same element share similar physical and chemical properties. They can also combine in more than one ratio to form two or more compounds.

Meanwhile, understand that the above theories of John Dalton had been modified.

Please read on Dalton's atomic theory and its modifications here

Chemistry

All human beings are entitled to a fundamental, inalienable, non-discriminatory, indivisible and universal rights which is termed human rights.

These fundamental rights of humans will allow each and every one of us to live in freedom, equality, fairness, respect, peace and justice.

There is neither discrimination nor distinction in human rights. It doesn't matter if you are are white or black, a Nigerian or a Chinese, male or female, physically challenged or physically complete, rich or poor, yoruba, igbo or hausa, christian, muslim, hindu or an atheist.

The point is: 'we all share the same human rights'.

Civic Education


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Earth is the only planet that contains water on it's surface. Infact, earth comprises of more water than land

Water: 71%

Land: 21%

Geography

Salt water or Saline water makes up about 97% of earth's water. It comprises majorly of ocean and sea waters

Geography

Rasceta is the name given to the lines on your palm

Basic Science

All babies are born with blue eyes

Biology

Research made at the University of Vienna suggested that yawning may play an essential role in cooling the brains

Biology

31,556,926 seconds makes one year

Mathematics

The letters 'Ough' can be pronounced in more than 9 different ways

English

Metal rains on planet Venus

Geography

Cows have got the ability to walk up stairs, but not down stairs

Agricultural Science

Goats have rectangular pupils in their eyes.

Think of the pupil as a hole located in the centre of the iris within of the eye.

To get an idea of an iris; 'when one is said to have blue eyes', it's because the iris is blue

Basic Science

Planet Mars appear brownish or reddish because it's covered with iron rust

Geography

Applesauce - Len Academy
Applesauce

Applesauce was the first food eaten in space by astronauts

Home Economics

Among all land animals, elephants have the longest gestation period.

They stay pregnant for 22 months before giving birth to their young

Basic Science

Kangaroos can't walk backwards

Basic Science

The milk of a hippopotamus is pink in color

Basic Science

Glass Ball - Len Academy

Glass balls bounce higher than rubber balls

Physics

The seed of all fruits are present on the inside with the exception of one.

That exception is strawberry

strawberry has it's seed outside the fruit

Basic Science

It takes a pineapple 2 years to grow

Basic Science

China is the largest emitter of carbon IV oxide (CO2) in our world today

Geography

There are over 125 billion galaxies in our universe. Our galaxy (milky way) has about 100-400 billion stars.

Understand that the sun is actually a star; and a single star can be 100 times bigger than the earth.

Geography

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Test Your Knowledge

The _____ functions to remove excess heat from the refrigerator.

  • A. Evaporator

  • B. Compressor

  • C. Condenser

  • D. Expansion Valve

  • E. Thermostat

  • F. Defrost System

Basic Technology

A fluid or gas that runs through the compartments of a refrigerator is termed _____.

  • A. Water vapor

  • B. Liquid vapor

  • C. Frost

  • D. Refrigerant

  • E. Compressed water

  • F. Evaporated water

Basic Technology

Which of the following is not a branch of environmental geography?

  • A. Physical Geography

  • B. Hazards

  • C. Political Ecology

  • D. Environmental Perception

  • E. Landscape Studies

  • F. Energy and Resource Geography

Geography

The feeding of five thousand men with five loaves of bread and two fishes paved way for Jesus' teaching on _____.

  • A. The sermon on the mount

  • B. The living bread

  • C. Prayer, fasting and almsgiving

  • D. The prodigal son

  • E. The good samaritan

  • F. Giving

CRS

According to Christianity, Jesus Christ suffered for us all. As a result, Christians do not have to suffer on earth.

  • A. True

  • B. False

CRS

A one-man business is termed _____.

  • A. Proprietorship

  • B. Sole Proprietorship

  • C. Individual Entrepreneurship

  • D. Sole Trader

  • E. All of the Above

  • F. None of the Above

Business Studies

The ideal pH for the optimum growth of most agricultural crop is between _____.

  • A. 1 – 3.5

  • B. 4 – 5.5

  • C. 6 – 7.5

  • D. 8 – 9.5

  • E. 10 – 11.5

  • F. 12 – 13.5

Agricultural Science

People who go about their lives by raising and herding livestock such as cattle, sheep and goats are said to practice _____.

  • A. Pastoralism

  • B. Pasturalism

  • C. Herding

  • D. Herdsmen

  • E. Animalism

  • F. Anime Farming

Agricultural Science

value that belongs naturally to someone is said to be _____.

  • A. Self

  • B. Neutral

  • C. Humane

  • D. Positive

  • E. Negative

  • F. Intrinsic

Civic Education

A traffic offender mandated to clean the roads is said to have carried out community service.

  • A. True

  • B. False

Civic Education

Which of the following is a fundamental quantity?

  • A. Luminous Intensity

  • B. Area

  • C. Volume

  • D. Velocity

  • E. Concentration

  • F. Acceleration

Physics

An object at rest will temporarily stay in its state of rest, and if the object is in uniform motion, it will temporarily move in a straight line, unless an external force acts upon it.

The above statement refers to Sir Isaac Newton's first law of motion.

  • A. True

  • B. False

Physics

_____ is defined as a gradual and sustained rise in price level of goods and services in relation to their availability.

  • A. Basis Point Rate

  • B. Hike Rate

  • C. Elastic Supply

  • D. Elasticity of Price

  • E. Price Inflation

  • F. Aggregate Supply

Economics

Which of the following is not a function of the wholesaler?

  • A. They distribute goods

  • B. They store goods

  • C. Specialization of goods

  • D. They bring about price variability in goods

  • E. They act as shock absorbers during the movement of goods

  • F. Packaging of goods

Business Studies

The wholesalers can bring about an economy of scale.

  • A. True

  • B. False

Economics

Which of the following diseases is associated with river blindness?

  • A. Anthrax

  • B. Lawnmower Disease

  • C. Onchocerciasis

  • D. Devil's Crunch

  • E. Trypanosomiasis

  • F. Tularemia

Basic Science

The vector for yellow fever is _____.

  • A. Aedes Mosquito

  • B. Female Anopheles Mosquito

  • C. Plasmodium

  • D. Flavivirus

  • E. Black Fly

  • F. Bacillus Anthracis

Basic Science