Jss1 third term Basic science past questions and answers

Here are 20  JSS1 basic science questions with options and answers:

Question: What is the chemical symbol for carbon?

 

A) Cn

B) Co

C) Cr

D) C

Answer: D) C

Question: Which force holds the planets in orbit around the Sun?

 

A) Friction

B) Magnetism

C) Gravity

D) Buoyancy

Answer: C) Gravity

Question: What is the process of changing from a gas to a liquid called?

 

A) Evaporation

B) Condensation

C) Sublimation

D) Freezing

Answer: B) Condensation

Question: What is the outermost layer of the Earth?

 

A) Crust

B) Mantle

C) Outer core

D) Lithosphere

Answer: A) Crust

Question: Which gas is responsible for the color of the sky?

 

A) Oxygen

B) Nitrogen

C) Helium

D) Hydrogen

Answer: B) Nitrogen

Question: What is the function of the red blood cells in the human body?

 

A) Carrying oxygen

B) Fighting infections

C) Clotting blood

D) Producing hormones

Answer: A) Carrying oxygen

Question: In the water cycle, what is the process of water being released from plant leaves into the atmosphere?

 

A) Condensation

B) Evaporation

C) Transpiration

D) Precipitation

Answer: C) Transpiration

Question: Which gas is essential for the process of respiration?

 

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

Answer: A) Oxygen

Question: What is the unit of measurement for electric current?

 

A) Joule

B) Volt

C) Ampere

D) Watt

Answer: C) Ampere

Question: What is the main function of the reproductive system?

 

A) Producing hormones

B) Eliminating waste

C) Exchanging gases

D) Producing offspring

Answer: D) Producing offspring

Question: What is the chemical symbol for iron?

 

A) I

B) Ir

C) Fe

D) Ni

Answer: C) Fe

Question: Which process involves the changing of a liquid into a gas at temperatures below its boiling point?

 

A) Evaporation

B) Condensation

C) Sublimation

D) Boiling

Answer: A) Evaporation

Question: What is the function of the ozone layer in the Earth’s atmosphere?

 

A) Absorbing carbon dioxide

B) Absorbing ultraviolet radiation

C) Regulating temperature

D) Facilitating photosynthesis

Answer: B) Absorbing ultraviolet radiation

Question: Which gas is produced as a byproduct of photosynthesis?

 

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Methane

Answer: A) Oxygen

Question: What is the process by which plants and animals release energy from food?

 

A) Respiration

B) Digestion

C) Photosynthesis

D) Fermentation

Answer: A) Respiration

Question: What is the smallest particle of an element that retains its chemical properties?

 

A) Atom

B) Molecule

C) Proton

D) Neutron

Answer: A) Atom

Question: Which layer of the Earth’s atmosphere is closest to space?

 

A) Mesosphere

B) Thermosphere

C) Stratosphere

D) Troposphere

Answer: B) Thermosphere

Question: What is the process of soil and rock being transported by wind, water, or ice?

 

A) Erosion

B) Weathering

C) Deposition

D) Sedimentation

Answer: A) Erosion

Question: What is the function of the mitochondria in a cell?

 

A) Storage of genetic material

B) Energy production

C) Synthesis of proteins

D) Transport of substances

Answer: B) Energy production

Question: Which gas is commonly used by plants in the process of respiration?

 

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

Answer: B) Carbon dioxide