King's College Cambridge Natural Sciences Interview

King's College Cambridge is one of the university's most distinctive institutions — famous for its chapel, its choir, and its strong tradition in the arts and humanities, but also home to a rigorous and intellectually vibrant Natural Sciences community. King's NST supervisors take the same problem-led, reasoning-focused approach that characterises Cambridge science supervision across the board, but the college's culture of genuine intellectual breadth means that interview discussions frequently extend beyond strict disciplinary boundaries. Candidates who can think across subjects — who can see how a principle in one science connects to a question in another — tend to perform particularly well at King's.

Natural Sciences at Cambridge is unusual among British science degrees in being genuinely interdisciplinary in its first year. All NST students take courses in three or four sciences simultaneously, only beginning to specialise in Year 2. This means King's supervisors are assessing you not for depth in a single subject but for scientific reasoning ability across physics, chemistry, biology, and mathematics. Candidates who have prepared narrowly for one discipline may be surprised to find their King's interview covering territory from multiple sciences.

How King's Natural Sciences Interviews Work

Natural Sciences applicants at King's typically have two interviews — one at King's and one at a second college through the pooling process. Each interview lasts approximately 25 to 35 minutes. King's NST interviews are problem-based: supervisors present questions, diagrams, data, or experimental scenarios and ask you to reason through them. The approach is consistent with the supervision format — you are expected to think aloud, engage with hints, and persist when problems are difficult.

The ESAT (Engineering and Science Admissions Test (ESAT)) is used to shortlist NST candidates, and strong ESAT performance — particularly in the physics and chemistry sections — is important for securing a King's interview. The ESAT tests exactly the kind of multi-disciplinary scientific reasoning that King's supervisors assess in interviews.

Preparation for King's Natural Sciences Interviews

Prepare across your chosen science subjects, not just the one you find easiest or most familiar. King's supervisors will move between disciplines during an interview, and candidates who have strong foundations across multiple sciences consistently perform better than those who have prepared deeply in one area only.

Develop the habit of explaining scientific phenomena from first principles rather than reciting explanations you have memorised. King's supervisors frequently ask “why” questions that require genuine mechanistic understanding: not “what is osmosis” but “why does water move across a semi-permeable membrane in this direction, and what would happen if you changed the temperature?” Building the habit of asking yourself “why does this happen at the level of particles and forces?” for every phenomenon you study is excellent interview preparation.

Work through ESAT past papers and understand every question you find difficult. The ESAT tests multi-disciplinary scientific reasoning in a format that directly parallels what you will encounter at interview.

Our Cambridge Natural Sciences interview preparation service provides subject-specific coaching across physics, chemistry, biology, and mathematics with mock interviews from Cambridge NST graduates.

Example King's Natural Sciences Interview Questions

• A cell is placed in a solution more concentrated than its cytoplasm. What happens and why?
• Sketch a graph of pressure against volume for an ideal gas at constant temperature. Now explain what happens at very high pressures.
• Why does adding salt to water lower its freezing point?
• If you doubled the mass of a satellite in orbit, what would happen to its orbital period?
• What is the difference between an endothermic and exothermic reaction at the molecular level?
• How would you design an experiment to measure the speed of sound in air using only equipment available in a school laboratory?

For free practice material, see our Cambridge Natural Sciences interview questions resource.

Frequently Asked Questions

What science subjects should I take to apply for Natural Sciences at King's?

Most Natural Sciences applicants take at least two science A-levels and Mathematics. Physics and Chemistry with Mathematics is a very common combination for physical NST; Biology and Chemistry with Mathematics for biological NST. King's does not specify exact A-level requirements, but you should be prepared to be assessed across multiple sciences in your interview regardless of your specific combination.

How does the ESAT affect my chances of a King's interview?

The ESAT is used by Cambridge to shortlist NST candidates and King's uses ESAT scores as a significant factor in interview decisions. Strong performance — particularly on the sections relevant to your intended specialisation — improves your chances meaningfully. Weak ESAT performance is difficult to overcome. Prepare for the ESAT seriously from October and treat it as integral to your Cambridge application.

Will my interview cover all three sciences?

Possibly. King's NST interviews often move between disciplines, and you may encounter questions from physics, chemistry, and biology in a single 30-minute session. The interdisciplinary nature of the first-year NST course means supervisors are specifically looking for students who can reason across subject boundaries. Prepare your weakest science subject as seriously as your strongest.

What is the most common mistake NST candidates make at King's?

Giving descriptions rather than explanations. Supervisors consistently distinguish between candidates who can say what happens and candidates who can say why it happens at a mechanistic level. “Water moves by osmosis” is a description. “The difference in water potential creates a concentration gradient that drives net diffusion of water molecules across the membrane from the region of higher to lower water potential” is an explanation. Always push yourself to the level of mechanism.