Activate 1 Workbook: KS3 Science Revision Guide | Activate 1 练习册：KS3 科学复习指南

📚 Activate 1 Workbook: KS3 Science Revision Guide | Activate 1 练习册：KS3 科学复习指南

The Activate 1 Workbook is a practical companion to the KS3 science course, offering short-answer questions, matching tasks and diagram-based exercises. It helps students practise scientific vocabulary, interpret data and apply key ideas from biology, chemistry and physics.

《Activate 1 练习册》是 KS3 科学课程的实用配套材料，提供简答题、配对题和图形题。它帮助学生练习科学词汇、解读数据，并应用生物、化学和物理中的核心概念。

1. Working Scientifically | 科学探究方法

Workbook questions on scientific enquiry usually ask you to identify the independent variable, dependent variable and control variables. A fair test changes only the independent variable, while all other factors are kept the same so the results are valid.

关于科学探究的练习册题目通常会要求你找出自变量、因变量和控制变量。公平实验只改变自变量，其他因素保持不变，这样结果才有效。

Graph work is also frequent: label the x-axis with the independent variable and the y-axis with the dependent variable, include units, and draw a smooth line of best fit. Always record observations in a results table before plotting.

绘图题也很常见：用 x 轴表示自变量，y 轴表示因变量，标出单位，并画出平滑的最佳拟合线。绘制图表前，务必先在结果表中记录观察结果。

2. Cells | 细胞

Typical questions ask you to label an animal cell and a plant cell. Plant cells have a cell wall, chloroplasts and a large permanent vacuole, whereas animal cells do not. Both have a nucleus, cytoplasm, cell membrane and mitochondria.

典型题目会要求你标注动物细胞和植物细胞。植物细胞有细胞壁、叶绿体和中央大液泡，而动物细胞没有。两者都有细胞核、细胞质、细胞膜和线粒体。

You also need to use the microscope formula:

total magnification = eyepiece magnification × objective magnification

你还需要使用显微镜公式：总放大倍数 = 目镜放大倍数 × 物镜放大倍数。同时要能够解释根毛细胞、精子和红细胞等特化细胞如何适应其功能。

3. Structure and Function of Body Systems | 身体系统的结构与功能

This unit links organs to organ systems. Examples include the breathing system, the circulatory system and the skeletal system. Workbook questions often ask you to place structures in order, such as trachea → bronchi → bronchioles → alveoli.

本单元将器官与器官系统联系起来。例如呼吸系统、循环系统和骨骼系统。练习册题目常要求你按顺序排列结构，例如气管 → 支气管 → 细支气管 → 肺泡。

Gas exchange happens in the alveoli, where oxygen moves into the blood and carbon dioxide moves out. In muscles and joints, antagonistic muscle pairs contract and relax to move bones at joints, and ligaments and cartilage support movement.

气体交换发生在肺泡中，氧气进入血液，二氧化碳从血液排出。在肌肉和关节中，拮抗肌对通过收缩和舒张使骨骼在关节处运动，韧带和软骨支撑运动。

4. Reproduction | 生殖

You should know the main structures of the male and female reproductive systems and their roles. Fertilisation occurs when the nucleus of a sperm cell fuses with the nucleus of an egg cell, producing a zygote that divides to form an embryo.

你应当了解男性和女性生殖系统的主要结构及其功能。受精发生时，精子细胞核与卵细胞核融合，形成合子，合子分裂形成胚胎。

Puberty causes physical changes such as growth spurts, voice changes and the start of periods. Plant reproduction is also part of this topic: pollination transfers pollen to the stigma, and fertilisation leads to seed formation

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