想学好GCSE化学,是离不开实验的。本文就来分享一些和实验相关的GCSE化学词汇,在ALEVEL或IB的后续学习阶段,也能用得上哟。
GCSE化学考试形式
无论是GCSE化学学的是拓展课程还是核心课程,学员都要考三张试卷。学习核心课程的学员考试卷1和试卷3以及试卷5或6,学习拓展课程的学员考试卷2和试卷4以及试卷5或6。
试卷1和2为选择题卷,一共有40道选择题,考试时间为45分钟;
试卷3和4为理论题卷,主要是简答题和结构化问题,所有题目都是必答题,考试时间是1小时15分钟,满分80分。
试卷5和6考查的都是实验技能,区别为试卷5需要进行实际操作,试卷6以笔试形式进行。
实验相关GCSE化学词汇
Anomalies
These are values in a set of results which are judged not to be part of the variation caused by random uncertainty.
一组结果中的值,这些结果被判断为不属于由不确定性变化引起的部分结果。
Evidence
Data which has been shown to be valid.
已被证明为有效的数据。
Fair test
A fair test is one in which only the independent variable has been allowed to affect the dependent variable.
公平测试只允许自变量影响因变量。
Hypothesis
A proposal intended to explain certain facts or observations.
为解释某些事实或观察而提出的提议。
Interval
The quantity between readings, eg a set of 11 readings equally spaced over a distance of 1 metre would give an interval of 10 centimetres.
读数之间的间隔量(如一组11个读数,在1米的距离上等距分布,则间距为10厘米)。
Precision
Precise measurements are ones in which there is very little spread about the mean value. Precision depends only on the extent of random errors – it gives no indication of how close results are to the true value.
测量是指在平均值上有很小的误差。精度只取决于随机误差的范围,但并没有指出结果与真实值有多接近。
Prediction
A prediction is a statement suggesting what will happen in the future, based on observation, experience or a hypothesis.
预测是一种基于观察、经验或假设对未来将会发生事情的陈述。
Range
The maximum and minimum values of the independent or dependent variables; important in ensuring that any pattern is detected. For example a range of distances may be quoted as either: 'From 10 cm to 50 cm' or 'From 50 cm to 10 cm'.
这个GCSE化学词汇讲的是自变量或因变量的最大值和最小值。例如,距离值域可以被引述为“从10厘米到50厘米”或“从50厘米到10厘米”。
Variables
These are physical, chemical or biological quantities or characteristics.
物理、化学或生物的数量或特征。
Categoric
Categoric variables have values that are labels, eg names of plants or types of material.
说明事物类别的名称,其取值是分类数据,如植物名称或材料类型。
Continuous
Continuous variables can have values (called a quantity) that can be given a magnitude either by counting (as in the case of the number of shrimp) or by measurement (eg light intensity,flow rate etc). Previously known as discrete variable.
连续变量可以有数值(称为数量),可以通过计数(如虾的数量)或测量(如光强度、流量等)给出数值大小。以前称为离散变量。
Control
Control variable is one which may, in addition to the independent variable, affect the outcome of the investigation and therefore has to be kept constant or at least monitored.
控制变量是指除了自变量之外,还可能影响结果的变量,因此必须保持这些变量不变或至少进行监测。
今日份GCSE化学词汇整理就到这里。GCSE是很多同学学习课程的起点,除了词汇,往往还会遇到适应问题,比如教学模式突变、可支配时间变多等等,如果你想更好地度过这段适应期,点击预约试听【IGCSE同步培训班】——
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