ALEVEL物理考试Structured question怎么解拿下这3种类型就能一通百通

ALEVEL物理考试中的Structured question文字题一直是许多考生最害怕的题型，因为它要求学员用英语完整地写出原因、推理、结果，不光考验物理能力，还考验英语表达能力。所以今天我们就结合ALEVEL物理考试真题来给大家梳理一下Structured question的三大经典类型，把类型和解题思路摸透了，在考场上就能以不变应变啦。

ALEVEL物理考试Structured question怎么解拿下这3种类型就能一通百通内容图片_1

ALEVEL物理考试简介

以爱德思考试局为例，Alevel物理IAL（International Advanced Level）分为IAS（International Advanced Subsidiary）和IA2（International A2）两个部分。

按照考试划分，Alevel物理一共有六个单元，分别是：

Unit1：Physics on the Go

Unit2：Physics at Work

Unit3： Exploring Physics

Unit4：Physics on the Move

Unit5：Physics from Creation to Collapse

Unit6： Experimental Physics

其中Unit 1、2、3是IAS考试，Unit 4、5、6是IA2考试。

Unit 1、2满分80，Unit 3满分50，Unit 4、5满分90，Unit 6满分50。

AS的时候物理需要考Paper1、2、3，A2的时候需要考Paper 4、5。Paper 1是选择题，Paper2、4是大题，Paper 3、5是实验题。相对来说，paper2比较困难，因为题目的灵活性比较强，而且需要背的定义概念比较多。

整套卷子用时一个小时，满分是60分。每一道大题的第一问基本都是定义题，所以一定要背熟每一个定义。定义题之后一般是计算题或者是解释题。

ALEVEL物理考试文字题答题技巧

01应用类Structured question

The photograph shows a toy car driven by air from a deflating balloon

ALEVEL物理考试Structured question怎么解拿下这3种类型就能一通百通内容图片_2

When the air in the inflated balloon is released, the car starts to move forwards.

(a) Use Newton’s first and third laws of motion to explain why the air coming out of the

balloon causes this.(3)

■ 这属于第一种类型：应用类,也被称之为一一对应类。就是把已知的物理原理定律等理清楚，然后看图思考，把题目中的物理量与定律中的物理量一一对应。

先回顾N3: the action force and the reaction force are equal in magnitude and opposite in direction,same type.

So the answer is:The force on air by balloon and the force on balloon by air are equal in magnitude and opposite in direction,same type.

再回顾N1: the object will stay at rest or constant velocity unless resultant force on it.

So the answer is added:The forward force on balloon is greater than drag force or air resistance, so there is a resultant force. By N1, the car moves from rest.

02想象类Structured question

Some paint manufacturers use pencils to test the hardness of paints using the equipment shown..

A pencil of known hardness is placed into a pencil tester and the tester is pushed across a surface coated in the paint under test.

ALEVEL物理考试Structured question怎么解拿下这3种类型就能一通百通内容图片_3

This is repeated using pencils of increasing hardness until the paint becomes scratched.

(ii) Suggest two reasons why this method may not produce reliable results.(2)

■ 这属于第二种类型：想象力的问题。这个方面的考察那可是每年必备啊。想象力，太重要了，因为如果没有想象力，科学就没有进步，同样，它也是科研探索必备素质。答题的时候，每个人的想象力不同，所以答案五花八门。

但是，如何让自己的答案既有想象力又能拿高分呢。亲们别慌，回顾所学后进行正向或者逆向推理，大胆一些，答案不会太大问题的啦。

先回顾Hard is the resistance for denting or scratching ,for example : diamond is hard.the instruments in the question is pencil, tester and paint, we use hands to do it.

So the answer is: For pencil:Maybe pencils all have different cross- section area,sharpness and direction of motion.

For tester:testers all have different speed

For hand: all hand exerts different force

For paint: the paint are different thickness and not evenly on the table

03比较类Structured question

A student searched on the internet to find the reason why old eggs float.

Statement 1 old eggs float because as the egg ages it starts to decompose,as it decomposes gases are produced that escape through the eggshell.

Statement 2 as the egg ages air enters the egg through the eggshell and increases the size of the air cell,the larger air cell acts as a floatation device and hence old eggs float.

Assess which of these two statements is correct.

■ 这属于第三种类型：比较题——比较两种影响因素，或者两种结论。这种类型的题目看上去难度很大。可是只要我们回顾分析再加上想象和推理，就一定能战胜它。

回顾：在水中，if weight>upthrust 就下沉，if upthrust>weight 就上升。

The Answer is :

statement 1 is correct.

Air escapes→density of eggs decreases→weight (mg) decreases,

Upthrust = ρgV constant

When resultant force ρgV-mg>0 , By N1 the egg starts moving upwards

Statement 2 is wrong,weight increases, resultant force is downward, accelerate downwards.

ALEVEL物理考试的三类文字题解题思路就介绍到这里啦。文字题这样的题目侧重的是对知识应用的考查，

要求学员比较、评估、计划、预测和给出建议。如果这方面的能力不够，肯定是会直接影响冲A*的。如果想在明年5月大考前精准提升这类能力，或是在其他国际课程上遇到了问题，点击预约试听【橡沐ALEVEL同步培训班】——

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