NCEA Level 1 Science: the nature of science and claims externals

NCEA Level 1 Science standards

That is 10 external and 10 internal credits, 20 in total. Level 1 Science is about how science works rather than a list of physics, chemistry and biology topics; those sit in the separate Level 1 subjects Physics, Earth and Space Science, and Chemistry and Biology. NZQA's past exams and assessment schedules are on its Science past exams page.

The NCEA Level 1 Science exam

NZQA's 2027 assessment specifications say both standards are assessed in an online digital exam. Each is a single question with several parts, answered in short sentences or paragraphs. The stimulus material, an account of how a science idea developed for 91922 and a set of science-related claims for 91923, comes in a separate paper booklet on the day, so you cannot learn it in advance.

What each external covers

Features of science (91922)

NZQA says the features assessed are chosen from: linking new evidence to existing models, theories and ideas; the influence of social and cultural factors on science; the influence of developing and using technology; responding to needs and opportunities; and science being tentative, where the only certainty is when a claim is disproved. Achieved identifies features and outlines how they contributed, Merit explains why each was significant, and Excellence discusses how the features interacted.

Science-related claims (91923)

A science-related claim uses scientific evidence to justify a conclusion, and communicated information can come from anywhere: conversations, radio, published research, advertising or online content. You describe the source, its purpose, the claims and the science language used; explain how that language supports the claims; and for Excellence evaluate how well the science information supports them.

Worked examples

Features of science: the Alpine Fault

Rocks of the same type are found in Nelson and in Otago and Southland, about 480 km apart on opposite sides of the Alpine Fault. Geologists in the 1940s explained this with huge sideways movement along the fault, an idea many doubted at the time. When plate tectonics was developed in the 1960s, it gave the idea a model: the Pacific and Australian plates slide past each other there.

• Linking new evidence to existing ideas: the matching rocks were evidence that the existing view of a fixed crust could not explain.
• Tentative by nature: the idea was doubted, then accepted as more evidence and a better model arrived.
• Technology: instruments such as GPS now measure the plates moving, adding new evidence.

An Excellence answer would go further and discuss how these features worked together, for example how new measuring technology produced the evidence that made the idea widely accepted.

Science-related claims: a sunscreen advert

An advert says a sunscreen "blocks 99% of harmful UV rays and is clinically proven". A strong answer notes that the source is the company selling the product, so its purpose is to persuade; asks what "clinically proven" means and whether the testing was independent, with enough people and a fair comparison; and explains whether the evidence given actually supports the claim, rather than just repeating it.

Read the evidence that changed the model of the atom in our Atomic Structure course, a classic case of new evidence reshaping an idea. Pressing Mark opens the question in the course, where you answer it and it is marked:

Grades, credits and endorsements

Every NCEA standard is graded Not Achieved, Achieved, Merit or Excellence, and earns its credits at whatever grade you reach. Achieved shows you meet the standard, Merit shows deeper understanding, and Excellence shows it applied to harder, unfamiliar problems.

• The certificate: NCEA Level 1 needs 60 credits at Level 1 or above, plus the 20-credit literacy and numeracy co-requisite, which you can gain any time before you leave school. Since 2024 you can no longer carry 20 credits over from the level below.
• Certificate endorsement: 50 credits at Merit or better gives a Merit endorsement; 50 at Excellence gives an Excellence endorsement.
• Course endorsement: 14 or more credits at Merit or Excellence in one subject in one year, with at least 3 from internal and 3 from external standards in most subjects.

Use the daily paper as a practice exam

Uni-Sine publishes a free daily paper on the NCEA Level 1 Science track. It is a short timed paper: 8 questions worth 25 to 35 marks, marked instantly, with worked answers. It is not a full NCEA exam and it is not written by NZQA, so treat it as a quick daily practice test alongside NZQA's past papers.

• What it covers well: core physics, chemistry and biology knowledge, such as atomic structure, inheritance, forces, electricity, energy changes and cells. That background helps you read the resource booklets, but it is not what the externals mark.
• What it does not cover: the skills the two externals assess: identifying features of science in an account of how an idea developed, and critiquing science-related claims. It also misses the internals. Practise those with NZQA past exams and their assessment schedules.

A good routine is one daily paper under timed conditions, then a careful look at every mark you dropped, then one NZQA past paper a week in the weeks before the exam.

NCEA changes for 2026, 2027 and beyond

NCEA still applies in 2026 and 2027, so the standards on this page are the ones you will sit. In 2028, Year 11 moves to a new foundational award focused on reading, writing and maths, and NCEA Level 1 ends. The Government agreed the structure of the new qualification system on 26 March 2026, and the Ministry of Education confirmed further details and the timeline on 16 May 2026.

Common mistakes in NCEA Level 1 Science

• Retelling the story. For 91922, name each feature of science and say how it helped the idea develop.
• Agreeing or disagreeing with a claim. For 91923, judge how well the evidence supports it, not whether you like it.
• Ignoring the source. Who made the information, and why, matters to how much you trust it.
• Not using the booklet. Quote details from the stimulus material as evidence.

Read next

New Zealand · NCEA Level 1NCEA Level 1 Physics, Earth and Space Science guideNCEA Level 1 PESS explained: the Sun, Earth and Moon and energy externals, the two internals, the 2026 exam date, 2027 dates and worked examples.