Jss2 first term Basic science past questions and answers

Question: What is the primary function of the heart in the human body?

a) Pumping blood

b) Digesting food

c) Filtering air

d) Storing nutrients

 

Answer: a) Pumping blood

 

Question: Which planet is known as the “Red Planet” in our solar system?

 

a) Venus

b) Mars

c) Jupiter

d) Saturn

 

Answer: b) Mars

 

Question: What is the chemical symbol for water?

 

a) O2

b) CO2

c) H2O

d) CH4

 

Answer: c) H2O

 

Question: Which gas is responsible for the green color of plants?

 

a) Oxygen

b) Carbon dioxide

c) Chlorine

d) Chlorophyll

 

Answer: d) Chlorophyll

 

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

 

a) Pumping blood

b) Breathing and exchanging gases

c) Digesting food

d) Controlling body temperature

 

Answer: b) Breathing and exchanging gases

 

Question: In the water cycle, what process involves water turning into vapor?

 

a) Evaporation

b) Condensation

c) Precipitation

d) Transpiration

 

Answer: a) Evaporation

 

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

 

a) Molecule

b) Atom

c) Cell

d) Electron

 

Answer: b) Atom

 

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

 

a) Magnetic force

b) Gravitational force

c) Centrifugal force

d) Frictional force

 

Answer: b) Gravitational force

 

Question: What is the chemical symbol for gold?

 

a) Au

b) Ag

c) Fe

d) Cu

 

Answer: a) Au

 

Question: What process involves the changing of a liquid into a gas at the surface of the liquid?

 

a) Melting

b) Freezing

c) Condensation

d) Boiling

 

Answer: d) Boiling

 

Question: Which gas do humans primarily exhale during respiration?

a) Oxygen

b) Nitrogen

c) Carbon dioxide

d) Hydrogen

 

Answer: c) Carbon dioxide

 

Question: What is the powerhouse of the cell?

a) Nucleus

b) Ribosome

c) Mitochondrion

d) Endoplasmic reticulum

 

Answer: c) Mitochondrion

 

Question: What is the main component of the Earth’s atmosphere?

a) Nitrogen

b) Oxygen

c) Carbon dioxide

d) Hydrogen

 

Answer: a) Nitrogen

 

Question: Which type of rock is formed from cooled and solidified lava?

a) Sedimentary

b) Metamorphic

c) Igneous

d) Magma

 

Answer: c) Igneous

 

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

a) Volt

b) Ampere

c) Watt

d) Ohm

 

Answer: b) Ampere

 

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

a) Photosynthesis

b) Respiration

c) Transpiration

d) Fermentation

 

Answer: a) Photosynthesis

 

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

a) Liver

b) Kidney

c) Stomach

d) Pancreas

 

Answer: b) Kidney

 

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

a) Digesting food

b) Controlling body temperature

c) Transmitting signals

d) Pumping blood

 

Answer: c) Transmitting signals

 

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

a) Coal

b) Solar

c) Natural gas

d) Nuclear

 

Answer: b) Solar

 

Question: What is the process of a liquid changing into a solid?

a) Melting

b) Freezing

c) Condensation

d) Boiling

 

Answer: b) Freezing