1.1 Practical Skills Written Assessment: Exam Question Drill | 1.1 实验技能书面评估 真题精练

📚 1.1 Practical Skills Written Assessment: Exam Question Drill | 1.1 实验技能书面评估 真题精练

Welcome to this focused drill on the A‑Level Biology practical skills written assessment. This paper tests your ability to design investigations, process data, identify errors, and evaluate conclusions without stepping into a laboratory. The following sections walk you through the most common question types and provide a clear framework for building high‑scoring answers.

欢迎来到本次A‑Level生物实验技能笔试真题精练。这张试卷考察你设计实验、处理数据、识别误差以及评估结论的能力——而这一切都不需要进入实验室。以下章节将带你梳理最常见的题型，并为你提供构建高分答案的清晰框架。

1. Identifying Variables | 识别变量

In any experiment, you must identify the independent variable (what you change), the dependent variable (what you measure), and the control variables (what you keep the same). For example, an investigation into the effect of light intensity on the rate of photosynthesis has light intensity (lux) as the independent variable, volume of oxygen produced per minute as the dependent variable, and temperature, CO₂ concentration, and plant species as control variables.

在任何实验中，你都必须识别自变量（你改变的变量）、因变量（你测量的变量）和控制变量（保持不变的变量）。例如，研究光照强度对光合作用速率的影响：自变量是光照强度（勒克斯），因变量是每分钟产生的氧气体积，控制变量包括温度、二氧化碳浓度和植物种类。

A common exam question gives a description of an experiment and asks you to state these variables. Read the method carefully to see what is being deliberately altered and what is being recorded. Control variables are often deduced from factors that might otherwise affect the result, such as pH, age of the organism, or volume of solution.

常见的考题会给出实验描述并要求你指出这些变量。仔细阅读实验方法，找出被故意改变的是什么，被记录的是什么。控制变量常常可以从那些否则可能影响结果的因素中推断出来，例如pH、生物体的年龄或溶液的体积。

2. Designing a Reliable Experiment | 设计可靠实验

A well‑designed experiment must be reliable, meaning it produces consistent results when repeated. To achieve this, include at least three repeats for each condition and calculate a mean. Always set up a control group—where the independent variable is absent or set to a standard—for comparison. Control all other variables that could influence the outcome, such as temperature, pH, or light conditions.

一个设计良好的实验必须是可靠的，也就是说，重复实验时能得到一致的结果。为此，每个条件至少要包含三次重复并计算平均值。一定要设立对照组（自变量缺失或设为标准条件）以便比较。控制所有其他可能影响结果的变量，如温度、pH或光照条件。

When selecting subjects or taking samples, randomisation helps eliminate bias. A large sample size

Published by TutorHao | Biology Revision Series | aleveler.com

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