Natural Sciences Admissions Assessment 2018 | 2018 年自然科学入学评估备考解析

📚 Natural Sciences Admissions Assessment 2018 | 2018 年自然科学入学评估备考解析

The 2018 Cambridge Natural Sciences Admissions Assessment (NSAA) remains one of the most useful past papers for students preparing for Cambridge science courses. This article breaks down its structure, core topics and strategies.

2018 年剑桥自然科学入学评估（NSAA）至今仍是备考剑桥科学课程最有用的历年试卷之一。本文详细拆解其结构、核心考点与应试策略。

1. What Was NSAA 2018? | 什么是 2018 年 NSAA？

The Natural Sciences Admissions Assessment 2018 was a pre-interview written test used by the University of Cambridge to assess applicants for Natural Sciences. It focused on mathematical fluency and scientific reasoning, not on memorising large amounts of factual content.

2018 年自然科学入学评估是剑桥大学在面试前使用的一项笔试，用于评估自然科学专业的申请者。它重点考查数学熟练度和科学推理能力，而不是大量记忆事实性内容。

The 2018 paper followed the older NSAA format: Section 1 had a compulsory Part A Mathematics section plus one chosen science from Physics, Chemistry or Biology. Section 2 then tested the same chosen science with more demanding multiple-choice questions.

2018 年试卷沿用旧版 NSAA 格式：Section 1 包含必答的 A 部分数学，以及从物理、化学、生物中自选的一门科学。Section 2 则用难度更高的选择题继续考查所选科学学科。

2. Why the 2018 Paper Matters | 为什么 2018 年试卷很重要

Past papers are the closest you can get to the real exam, and the 2018 NSAA is especially useful because it shows the balance between calculation, data interpretation and conceptual understanding expected at Cambridge level.

历年真题是最接近真实考试的资源，而 2018 年 NSAA 尤其有用，因为它展示了剑桥水准所要求的计算、数据解读和概念理解之间的平衡。

Many students who later sat the NSAA found that the 2018 questions were slightly less abstract than some later papers, but they still required very quick and accurate mental arithmetic.

许多后来参加 NSAA 的学生发现，2018 年的题目比某些后续年份略少抽象，但仍然要求非常快速和准确的心算能力。

3. Exam Structure and Timing | 考试结构与时间安排

The 2018 NSAA was divided into two sections. The table below summarises the format that most candidates experienced in the 2018 sitting.

2018 年 NSAA 分为两个部分。下表总结了大多数考生在 2018 年考试中遇到的试卷格式。

There was no calculator allowed in the 2018 NSAA, which made estimation and rearranging equations by hand essential skills.

2018 年 NSAA 不允许使用计算器，因此估算和手算整理方程成为必备技能。

4. Section 1 Part A: Mathematics Core | Section 1 A 部分：数学核心

The compulsory mathematics part tested algebra, fractions, percentages, ratio, sequences, basic geometry and graph interpretation. Questions were designed to be solved in under two minutes each.

数学必答部分考查代数、分数、百分比、比、数列、基础几何和图像解读。题目设计为每题在两分钟内完成。

One typical type asked you to solve a quadratic equation or simplify an algebraic fraction. For example, the quadratic formula was often needed:

一种典型题型要求解一元二次方程或化简代数分式。例如，经常需要用到求根公式：

x = (−b ± √(b² − 4ac)) ÷ (2a)

You also needed to be comfortable with unit conversions, such as changing km/h to m/s by multiplying by 1000/3600 = 5/18.

你还需要熟练掌握单位换算，例如将 km/h 转换为 m/s，乘以 1000/3600 = 5/18。

A common 2018-style problem asked for the average speed of a vehicle that travelled 90 km in 1.5 hours. The answer is 90 ÷ 1.5 = 60 km/h, which is equivalent to 60 × 5/18 = 16.7 m/s.

2018 年常见题型之一是求一辆 1.5 小时行驶 90 km 的车辆的平均速度。答案是 90 ÷ 1.5 =

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