📚 Year 7 WJEC Physics: International Competition Preparation Guide | Year 7 WJEC 物理：国际竞赛备战攻略
This guide provides a step-by-step plan for Year 7 students following the WJEC physics curriculum to excel in international science competitions. From mastering core concepts to developing exam techniques, you will find actionable advice and bilingual explanations that bridge language gaps and deepen understanding.
本攻略为遵循WJEC物理课程的七年级学生提供分步计划，帮助他们在国际科学竞赛中脱颖而出。从掌握核心概念到培养考试技巧，你将找到切实可行的建议和双语讲解，既能弥合语言差异，又能加深理解。
1. Understanding the Competition Landscape | 了解竞赛格局
Before you start studying, research the specific competition you are entering. Popular ones for Year 7 students include the British Physics Olympiad (BPhO) Junior Physics Challenge, UKMT team challenges that involve physics, and the International Junior Science Olympiad (IJSO). These contests test WJEC core topics but often at a deeper applied level. Familiarise yourself with the format: multiple-choice questions, short-answer problems, and sometimes a practical or team challenge. Knowing the structure helps you prioritise your revision.
在你开始学习之前，先了解你要参加的竞赛。七年级学生常参加的包括英国物理奥林匹克初级物理挑战(BPhO Junior Physics Challenge)、涉及物理的UKMT团队挑战，以及国际初中科学奥林匹克(IJSO)等。这些竞赛考察WJEC核心主题，但通常要求更深入的应用。熟悉题型：选择题、简答题，有时还有实验或团队挑战。了解结构有助于你合理分配复习重点。
Make a timeline: competitions are often held in spring or summer. Allocate at least two months for preparation, with weekly goals. Break down topics and assign one or two per week. This prevents last-minute cramming and builds steady confidence.
制订时间表：竞赛通常在春季或夏季举行。至少安排两个月的准备时间，并设定每周目标。将主题分解，每周安排一至两个。这能避免临时抱佛脚，稳步建立信心。
Check the official syllabus for your targeted competition. Although it is based on Year 7 science, some topics like energy resources, circuit analysis, or astronomical facts may appear with extra depth. Cross-reference with the WJEC specification to spot any gaps.
查阅目标竞赛的官方大纲。虽然以七年级科学为基础，但能源、电路分析或天文知识等可能考得更深。对照WJEC课程大纲找出差距。
2. Mastering Core Concepts: Force and Motion | 掌握核心概念：力与运动
In WJEC Year 7 physics, forces are pushes or pulls that can change an object's motion or shape. You need to distinguish between contact forces (f
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