Jss3 first term Basic science past questions and answers

Question: What is the chemical symbol for water?

A) H2O

B) CO2

C) O2

D) CH4

Answer: A) H2O

Question: Which planet is known as the “Red Planet”?

 

A) Venus

B) Mars

C) Jupiter

D) Saturn

Answer: B) Mars

Question: What is the process by which plants make their own food?

 

A) Respiration

B) Photosynthesis

C) Digestion

D) Transpiration

Answer: B) Photosynthesis

Question: Which gas do plants absorb during photosynthesis?

 

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

Answer: B) Carbon dioxide

Question: What is the largest organ in the human body?

 

A) Heart

B) Liver

C) Skin

D) Brain

Answer: C) Skin

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

 

A) Pump blood

B) Filter waste

C) Exchange gases

D) Digest food

Answer: C) Exchange gases

Question: Which force pulls objects towards the center of the Earth?

 

A) Magnetic force

B) Frictional force

C) Gravitational force

D) Electrostatic force

Answer: C) Gravitational force

Question: What is the unit of electric current?

 

A) Joule

B) Ampere

C) Volt

D) Watt

Answer: B) Ampere

Question: Which planet is closest to the Sun?

 

A) Venus

B) Earth

C) Mercury

D) Mars

Answer: C) Mercury

Question: What is the chemical symbol for gold?

 

A) Au

B) Ag

C) Fe

D) Cu

Answer: A) Au

Question: Which gas do humans exhale during respiration?

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

Answer: B) Carbon dioxide

Question: What is the chemical symbol for iron?

A) Au

B) Ag

C) Fe

D) Cu

Answer: C) Fe

Question: What is the powerhouse of the cell?

A) Nucleus

B) Mitochondria

C) Ribosome

D) Endoplasmic reticulum

Answer: B) Mitochondria

Question: What is the main function of the liver in the human body?

A) Pump blood

B) Filter waste

C) Produce hormones

D) Detoxify substances

Answer: D) Detoxify substances

Question: Which of the following is a renewable energy source?

A) Coal

B) Natural gas

C) Solar power

D) Nuclear power

Answer: C) Solar power

Question: What is the chemical symbol for oxygen?

A) O2

B) CO2

C) H2O

D) N2

Answer: A) O2

Question: Which layer of the Earth’s atmosphere contains the ozone layer?

A) Troposphere

B) Stratosphere

C) Mesosphere

D) Thermosphere

Answer: B) Stratosphere

Question: What is the SI unit of force?

A) Newton

B) Watt

C) Joule

D) Kilogram

Answer: A) Newton

Question: What is the chemical formula for methane?

A) CH4

B) CO2

C) H2O

D) N2

Answer: A) CH4

Question: Which organ is responsible for filtering blood in the human body?

A) Liver

B) Kidney

C) Heart

D) Lungs

Answer: B) Kidney