N-Level Science

Question 1

What is the chemical formula for water?

Accepted Answer

H₂O

Answer

CO₂

Answer

NaCl

Answer

O₂

Question 2

What is photosynthesis?

Accepted Answer

The process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen

Answer

The process by which animals breathe

Answer

The process of digesting food

Answer

The process of evaporation

Question 3

What is the SI unit of force?

Accepted Answer

Newton

Answer

Joule

Answer

Watt

Answer

Pascal

Question 4

In the human body, what is the function of red blood cells?

Accepted Answer

To transport oxygen from the lungs to body tissues using haemoglobin

Answer

To fight infections

Answer

To clot blood at wound sites

Answer

To digest food

Question 5

What is an electric circuit?

Accepted Answer

A closed loop through which electric current can flow, consisting of a power source, conductors, and electrical components

Answer

A type of sports track

Answer

Any piece of wire

Answer

A type of battery

Question 6

What happens to the temperature of a substance during a change of state (e.g., melting)?

Accepted Answer

Temperature remains constant as energy is used to break intermolecular bonds rather than increase kinetic energy

Answer

Temperature increases rapidly

Answer

Temperature decreases

Answer

Temperature fluctuates randomly