JSS3 Second Term Basic Science Past Questions And Answers
20 JSS3 Second Term Basic Science questions with options and answers:
Question: What is the SI unit of electric charge?
A) Ampere-hour
B) Coulomb
C) Volt
D) Ohm
Answer: B) Coulomb
Question: Which gas is responsible for the Earth’s greenhouse effect?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Methane
Answer: C) Carbon dioxide
Question: What is the function of the liver in the human body?
A) Pumping blood
B) Digestion of fats
C) Filtration of blood
D) Respiratory exchange
Answer: B) Digestion of fats
Question: What is the largest planet in our solar system?
A) Earth
B) Jupiter
C) Saturn
D) Uranus
Answer: B) Jupiter
Question: What is the process of converting solids directly into vapor without passing through the liquid state?
A) Evaporation
B) Sublimation
C) Condensation
D) Precipitation
Answer: B) Sublimation
Question: Which of the following is a conductor of electricity?
A) Rubber
B) Glass
C) Copper
D) Wood
Answer: C) Copper
Question: What is the chemical symbol for helium?
A) He
B) Hl
C) Hy
D) Hea
Answer: A) He
Question: What is the process by which plants and animals exchange gases with their environment?
A) Transpiration
B) Respiration
C) Photosynthesis
D) Fermentation
Answer: B) Respiration
Question: What is the primary function of the circulatory system?
A) Exchange of gases
B) Filtration of blood
C) Pumping blood
D) Digestion of food
Answer: C) Pumping blood
Question: What is the chemical formula for methane?
A) CH4
B) CO2
C) H2O
D) N2
Answer: A) CH4
Question: Which layer of the Earth’s atmosphere protects us from meteoroids?
A) Troposphere
B) Stratosphere
C) Mesosphere
D) Exosphere
Answer: C) Mesosphere
Question: What is the function of the white blood cells?
A) Carrying oxygen
B) Fighting infections
C) Clotting blood
D) Carrying nutrients
Answer: B) Fighting infections
Question: What is the main component of natural gas?
A) Methane
B) Propane
C) Butane
D) Ethane
Answer: A) Methane
Question: What is the unit of measurement for frequency?
A) Hertz
B) Watt
C) Volt
D) Ampere
Answer: A) Hertz
Question: Which metal is liquid at room temperature?
A) Iron
B) Mercury
C) Aluminum
D) Copper
Answer: B) Mercury
Question: What is the process of breaking down complex substances into simpler ones by living organisms?
A) Respiration
B) Fermentation
C) Digestion
D) Photosynthesis
Answer: C) Digestion
Question: What is the role of the Earth’s magnetic field?
A) Absorbing sunlight
B) Filtering ultraviolet radiation
C) Protecting from solar wind
D) Producing oxygen
Answer: C) Protecting from solar wind
Question: Which of the following is a physical change?
A) Burning wood
B) Rusting iron
C) Melting ice
D) Digesting food
Answer: C) Melting ice
Question: What is the chemical symbol for silver?
A) Sv
B) Si
C) Ag
D) Al
Answer: C) Ag
Question: What is the purpose of a concave lens?
A) M
agnifying objects
B) Correcting farsightedness
C) Correcting nearsightedness
D) Reflecting light
Answer: C) Correcting nearsightedness.
