Download WAEC Question and Answer 2020 in PDF

Preparing for WAEC 2020 can be made easier with practice. Below are important questions and answers for each subject to help you understand what to expect in the exam.

All Subejcts WAEC Question and Answer 2020

English Language

Question What is the main theme of the passage?

Answer The main theme of the passage is the importance of education.

Question Identify the figure of speech in the sentence “He fought like a lion.”

Answer The figure of speech is a simile.

Question What is the function of a noun in a sentence?

Answer A noun functions as the subject, object, or complement in a sentence.

Question Write a letter to your friend describing your last vacation.

Answer Dear Friend, I had a wonderful vacation last summer. I visited my grandparents and enjoyed playing with my cousins. We went to the beach, where we had lots of fun swimming and building sandcastles. I also learned how to ride a bicycle, which was the highlight of my holiday.

Question What is the difference between an adjective and an adverb?

Answer An adjective describes a noun, while an adverb modifies a verb, adjective, or another adverb.

Question Identify the verb in the sentence “She quickly finished her homework.”

Answer The verb in the sentence is “finished.”

Question What is the purpose of a topic sentence in a paragraph?

Answer The purpose of a topic sentence is to introduce the main idea of the paragraph.

Question Write a short story about a memorable day in your life.

Answer One memorable day in my life was when I won the school spelling bee. I had been practicing for weeks, and when my name was announced as the winner, I felt a rush of excitement and pride. My parents were so proud, and it was a day I will never forget.

Question What is the difference between direct and indirect speech?

Answer Direct speech quotes the exact words spoken, while indirect speech paraphrases the words without quoting them directly.

Question Explain the use of a conjunction in a sentence.

Answer A conjunction connects words, phrases, or clauses in a sentence.

Question What is the role of punctuation in writing?

Answer Punctuation helps to clarify meaning and indicates pauses or stops in writing.

Question Identify the pronoun in the sentence “They went to the park.”

Answer The pronoun in the sentence is “They.”

Question What is the difference between a simple sentence and a compound sentence?

Answer A simple sentence contains one independent clause, while a compound sentence contains two or more independent clauses joined by a conjunction.

Question Write a dialogue between two friends discussing their favorite books.

Answer Friend 1: “I just finished reading ‘The Alchemist.’ It was so inspiring!” Friend 2: “Really? I’ve heard great things about that book. I’m currently reading ‘To Kill a Mockingbird,’ and it’s really captivating.”

Question What is the importance of a conclusion in an essay?

Answer The conclusion summarizes the main points and reinforces the thesis of the essay.

Question What is a metaphor? Give an example.

Answer A metaphor is a figure of speech that compares two unlike things without using “like” or “as.” Example: “The world is a stage.”

Question Identify the subject in the sentence “The cat chased the mouse.”

Answer The subject in the sentence is “The cat.”

Question What is the difference between active and passive voice?

Answer In active voice, the subject performs the action, while in passive voice, the subject receives the action.

Question Write an essay on the benefits of reading.

Answer Reading is a crucial activity that offers numerous benefits. It enhances vocabulary, improves comprehension, and broadens knowledge. Regular reading also strengthens cognitive abilities and reduces stress. Additionally, reading can provide entertainment and serve as a productive way to spend leisure time. Overall, the habit of reading contributes to personal and academic growth.

Question What is the function of an article in a sentence?

Answer An article is a word that defines a noun as specific or unspecific, such as “the,” “a,” or “an.”

Mathematics

Question What is the sum of 45 and 32?

Answer The sum is 77.

Question Simplify the expression 5x + 3x.

Answer The simplified expression is 8x.

Question Calculate the area of a rectangle with a length of 10 cm and a width of 5 cm.

Answer The area is 50 square centimeters.

Question What is the value of x if 3x = 9?

Answer The value of x is 3.

Question Convert 0.75 to a fraction.

Answer 0.75 as a fraction is 3/4.

Question What is the perimeter of a square with a side length of 4 cm?

Answer The perimeter is 16 cm.

Question Solve for y in the equation 2y + 5 = 15.

Answer The value of y is 5.

Question What is the product of 7 and 8?

Answer The product is 56.

Question If a triangle has angles of 45° and 55°, what is the measure of the third angle?

Answer The third angle measures 80°.

Question Simplify the expression 6a – 4a.

Answer The simplified expression is 2a.

Question Calculate the volume of a cube with a side length of 3 cm.

Answer The volume is 27 cubic centimeters.

Question What is the mean of the numbers 4, 8, 12, and 16?

Answer The mean is 10.

Question Solve for z in the equation 5z = 25.

Answer The value of z is 5.

Question What is the greatest common factor of 18 and 24?

Answer The greatest common factor is 6.

Question Convert 20% to a decimal.

Answer 20% as a decimal is 0.2.

Question What is the square root of 64?

Answer The square root of 64 is 8.

Question If the radius of a circle is 7 cm, what is its circumference? Use π = 22/7.

Answer The circumference is 44 cm.

Question Solve for x in the equation x/2 = 10.

Answer The value of x is 20.

Question What is the least common multiple of 3 and 4?

Answer The least common multiple is 12.

Question Calculate the difference between 100 and 37.

Answer The difference is 63.

Physics

Question What is the formula for calculating speed?

Answer The formula is speed = distance/time.

Question Define inertia.

Answer Inertia is the resistance of an object to a change in its state of motion.

Question What is the unit of force?

Answer The unit of force is the Newton (N).

Question Explain Newton’s first law of motion.

Answer Newton’s first law states that an object will remain at rest or in uniform motion unless acted upon by an external force.

Question What is the speed of light in a vacuum?

Answer The speed of light in a vacuum is approximately 300,000 km/s.

Question What is the difference between mass and weight?

Answer Mass is the amount of matter in an object, while weight is the force of gravity acting on that mass.

Question Define potential energy.

Answer Potential energy is the energy stored in an object due to its position or condition.

Question What is the formula for calculating work done?

Answer The formula is work = force × distance.

Question Explain the law of conservation of energy.

Answer The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Question What is kinetic energy?

Answer Kinetic energy is the energy an object has due to its motion.

Question Define acceleration.

Answer Acceleration is the rate of change of velocity with time.

Question What is the principle of moments?

Answer The principle of moments states that for an object in equilibrium, the sum of the clockwise moments about a point is equal to the sum of the anticlockwise moments.

Question What is the SI unit of energy?

Answer The SI unit of energy is the Joule (J).

Question Explain the concept of pressure.

Answer Pressure is the force exerted per unit area.

Question What is the formula for calculating density?

Answer The formula is density = mass/volume.

Question Define friction.

Answer Friction is the force that opposes the motion of an object.

Question What is the difference between speed and velocity?

Answer Speed is the rate at which an object moves, while velocity includes both speed and direction.

Question Explain Ohm’s law.

Answer Ohm’s law states that the current through a conductor is directly proportional to the voltage across it, provided the temperature remains constant.

Question What is a scalar quantity?

Answer A scalar quantity has magnitude but no direction, such as temperature or mass.

Question What is a vector quantity?

Answer A vector quantity has both magnitude and direction, such as force or velocity.

Chemistry

Question What is the chemical formula for water?

Answer The chemical formula for water is H2O.

Question Define an atom.

Answer An atom is the smallest unit of matter that retains the properties of an element.

Question What is the periodic table?

Answer The periodic table is a chart that organizes all known elements by increasing atomic number.

Question Explain the difference between a molecule and a compound.

Answer A molecule is a group of atoms bonded together, while a compound is a substance formed when two or more different elements chemically bond together.

Question What is the pH scale?

Answer The pH scale measures how acidic or basic a substance is, ranging from 0 to 14.

Question Define a chemical reaction.

Answer A chemical reaction is a process in which substances interact to form new substances.

Question What is the law of conservation of mass?

Answer The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction.

Question What is an acid?

Answer An acid is a substance that donates protons (H+) and has a pH less than 7.

Question What is a base?

Answer A base is a substance that accepts protons (H+) and has a pH greater than 7.

Question What is an isotope?

Answer Isotopes are atoms of the same element with different numbers of neutrons.

Question Define valency.

Answer Valency is the combining power of an element.

Question What is an ion?

Answer An ion is an atom or molecule with an electrical charge due to the loss or gain of one or more electrons.

Question Explain the process of electrolysis.

Answer Electrolysis is the process of using electricity to decompose a compound into its elements.

Question What is the difference between an exothermic and an endothermic reaction?

Answer An exothermic reaction releases heat, while an endothermic reaction absorbs heat.

Question What is the chemical formula for sodium chloride?

Answer The chemical formula for sodium chloride is NaCl.

Question Define oxidation.

Answer Oxidation is the loss of electrons during a chemical reaction.

Question What is a catalyst?

Answer A catalyst is a substance that speeds up a chemical reaction without being consumed.

Question What is the atomic number?

Answer The atomic number is the number of protons in the nucleus of an atom.

Question Define covalent bond.

Answer A covalent bond is a chemical bond formed by the sharing of electron pairs between atoms.

Question What is a mixture?

Answer A mixture is a combination of two or more substances that are not chemically bonded.

Biology

Question What is the basic unit of life?

Answer The basic unit of life is the cell.

Question Define photosynthesis.

Answer Photosynthesis is the process by which green plants use sunlight to synthesize food from carbon dioxide and water.

Question What is the function of the nucleus in a cell?

Answer The nucleus controls the cell’s activities and contains genetic material.

Question What is an enzyme?

Answer An enzyme is a protein that speeds up chemical reactions in the body.

Question Define DNA.

Answer DNA is the molecule that carries genetic information in living organisms.

Question What is the function of the respiratory system?

Answer The respiratory system is responsible for exchanging gases between the body and the environment.

Question What is a gene?

Answer A gene is a segment of DNA that codes for a specific protein.

Question Define osmosis.

Answer Osmosis is the movement of water molecules through a semipermeable membrane from an area of lower concentration to an area of higher concentration.

Question What is the role of the digestive system?

Answer The digestive system breaks down food into nutrients that the body can absorb.

Question What is the function of red blood cells?

Answer Red blood cells carry oxygen from the lungs to the rest of the body.

Question Define mitosis.

Answer Mitosis is the process by which a cell divides to form two identical daughter cells.

Question What is the difference between a plant cell and an animal cell?

Answer A plant cell has a cell wall and chloroplasts, while an animal cell does not.

Question What is the role of chlorophyll in plants?

Answer Chlorophyll is the pigment that allows plants to absorb light energy for photosynthesis.

Question Define ecology.

Answer Ecology is the study of the interactions between organisms and their environment.

Question What is the function of the circulatory system?

Answer The circulatory system transports blood, nutrients, and oxygen throughout the body.

Question What is a habitat?

Answer A habitat is the natural environment where an organism lives.

Question Define biodiversity.

Answer Biodiversity refers to the variety of life in a particular habitat or ecosystem.

Question What is the role of the immune system?

Answer The immune system protects the body against disease and infection.

Question What is a food chain?

Answer A food chain is a series of organisms each dependent on the next as a source of food.

Question Define adaptation.

Answer Adaptation is the process by which an organism becomes better suited to its environment.